There’s also a bit more at play with the bus rule.
Take a seat in an empty row first
Not in front of someone that looks sketchy
Not immediately behind someone particularly
attractive unless other rows are full (can be creepy)
If you must share a row don’t sit next to the meth head OR the young girl.
Don’t sit towards the rear when there’s a group of troublemakers on the rearmost seats.
Do sit near exits but preferably one row behind others so you’re not the first person noticed by someone sketchy
There’s more but a lot of optimisation, particularly lo safety and social comfort, goes into selecting the best seating and neurotypical people do it completely subconsciously.
I do not think it is you at all. I am on the autism spectrum myself and I purposely sit away from others because being boxed in by other people causes me to be way overstimulated. I don't believe it is intended to be a slight against you, rather it's just people's preferences.