I do believe people to be self-interested at their core so it bothers me that people with apparently nothing to offer no money, no car, no looks, no career benefits etc.- have friends.
People DO seek out friends of similar or higher social status to them, you're getting a hard time for mentioning these as things to offer when it happens, when there's thread after thread of people judging others for the amount of money that's been spent on them is often met with "what a shit friend, no gift is better than cheap shit" or if someone has a friend who can't afford to do the things the other wants and needs cheaper alternatives and the advice includes "don't compromise, you deserve a week in Dubai, if she can't afford it then you aren't compatible? I'd phase her out"
Theres fully grown women who don't let their children form friendships with kids from the council estate. I've seen those posts on here a lot. I've seen people on here say one of the reasons they choose to send their children to private or boarding school is for the social connections as well as the education.
I see it in real life too, I used to hear women in the school playground much and laugh at other women for the car they drive, their child's hobbies, where they go on holiday and I used to just stand by myself because I felt very intimidated that they'd laugh at me too, and how nice and sweet they were to their friends faces and then talking about them like shit the second they leave, they'd be stood arranging a night out and then when one walks away they moan that they have to go somewhere "nasty" cos it's all the other mate can afford.
I can totally see why you think friendship is usually built based on what you can offer people because there's undertones of it everywhere and being autistic (I am too) and trying to understand how relationships work and fit in is hard, especially when a lot of people's behaviour doesn't match what they say they believe.
Im all the things on your nothing to offer list but I'm ok with that. I didn't have friends for a long time because I thought I was worthless and didn't deserve them, too boring, too poor, too rough, too stupid etc but I started work on myself, I sought autistic friends and that's been much easier. Some of my friends are much wealthier than I am and I didn't know that until quite a bit into our friendship. We bonded over how horrible it is when sainsbury change the fucking aisles around one of the things my friends say I'm good at is helping them understand things without making them feel stupid for not knowing.
For what it's worth, the wanting someone to help if car breakdown comment isn't that unusual either, dh used to work in recovery and said it was actually very very common for people, especially women to have called a family member or friend for help, I've helped my friend when her car broke down, and it's not a case of just phone aa for her, the change of plan, the being late, the anxiety of being alone in an unfamiliar place at night, are things she just needed a bit of emotional support with to avoid a full on meltdown. It's really not so easy as just phone aa for some people and that's it, I'm more than happy to help any friend if they're struggling with it.