It happens.
When I've hopped off the tractor or walked straight from the workshop and driven to town to get some parts without changing out of the flanny and jeans with a story I've frequently been met by sales staff with "Ya right mate?" or "After something cheap?" to being second guessed and straight up fobbed off.
Clean jeans and a less comfortable shirt and everything's different. Then it's "may I help you sir".

Tedious..
Especially so when you're just trying to get a job done.

Makes me prefer to source parts online when there's time or by phone when time's short.
Makes me laugh when I hear local retailers complaining about losing sales to online retailers.

Yes and no.
When I sold real estate, the richest investor in the joint, paddled around wearing a paint stained singlet, shorts and thongs!

And compare that with the kid wearing his entire fortune on his body as say, bling!

However, one can walk into a crowed room, only to find a particular stranger, with a particularly piecing stare; raises the hackles or the hair on the back of the neck, or just provokes a instant dislike or discomfort!

These are the first impressions that should never ever be ignored or rejected; and not reliant on your eyes, given the some internal intuitive signals can be felt in the dark of a moonless night!

Maybe it's just me or a triple distilled Celtic thing?

Nonetheless, the worse mistakes of my life have been mine, when I've allowed things like greed or ambition to overcome, that tiny small voice or feeling/intuition!

And no it's very much not a feminine thing, given I'm very much an alpha male in every sense of the word; as you'd would have likely found out, had you faced me on the football field or in the square ring!

Being open to new experiences/sensitive new age guy and an alpha male, are not mutually exclusive traits, albeit the later suppressed by early brutality, and then honed on the football field/the square ring; or in the wild, when hunting (feral, food for the table) game!

I had my first bare knuckle fist fight, when I was six, and he was fifteen.
Guess who won?
Rhrosty.

Do not judge a book by its cover, if only this was the case, many books (people) are hidden for life because the cover is not depicting their true content (self), if the cover depicted who they are the book may end in the rubbish bin (not wanted)) and readability (understanding) lost.

Whenever I fly, I always wear my best (yet comfortable) clothes and put on a string of pearls. By my reckoning, this allows me to avoid being taken aside and searched. So far, it seems to have worked.

Once upon a time, 1960 to be precise, a mate and I were smuggling tobacco into Northern Ireland from the Republic.
We'd buy round tins of 'Fine Cut' then hammer another two tins contents into one; saved space.
We travelled by train and on our first venture the train was boarded by Customs and RUC policemen who proceeded to empty out the bags of women who'd been shopping in the Republic, and when I say emptied out they did just that, up ended the contents onto the floor.
There were a section of the para-military "B" Special police on the platform,[reminded us of wartime films about the Germans in Occupied France]
We were dressed in blue yachting jackets, grey slacks, white shirts and wearing our respective Military Corps Ties [young officers' 'undress' of the time] and when the Customs Officer reached us we raised our Australian Passports out of our top pockets till the words 'British Passport' were visible.

Result: a salute and a cheery "Roight, Sor!" and away they went, all smiles, into the next carriage.

Suggest you have a passing look at Statistics. Data comes in, only a little but decisions have to be made, so the little available information is referenced against previous if not directly related events.

More data, but less than a sample: If strongly indicative than tentative data based decisions can be made. If not far from average then the data says nothing, iff it clusters deviations away then, though small, limited decisions can be reliably made.

Lots of data, firm decisions made.

The thing is to be flexible along the way, analyse each stage independently.

The point is decisions have to be made with all levels of data, given "no" decision is a decision and a default answer is seldom valid. In the real world away from Unis and other privileged places decisions and their actions are like tides, they wait for no-one.

As pointed out by Is Mise first stage is easily gamed but full information would probably require a micro-chip in everyone, a greater crime.