Priority seating for seniors and people with disabilities should be called Priority seating for kids and teens.
Sure, sure, yes, yes, there are those old people and disabled that are entitled to sitting there, and make no attempt to hide it. It is demanded by them.

However, seems like half the time, all I see are old people walking to the back of the bus, or a few times, I've seen guys with canes say to the kids, "I'm just going a few stops, I'll stand."

That's Portland. Super nice and super chill. Like the super nice guy letting everyone on the bus first before him, and it's a "you go, no you go," love affair, while I'm just saying get the fuck on the bus. No one cares for your chivalry.