Modern society stigmatizes that kind of interaction, don't talk to people you don't know if you don't want to be ostracized. You could want to befriend someone in a crowd, but come up with no good ways to go about the situation. See someone wearing a cool jacket and you decide you want to be their friend > Go up and introduce yourself > See almost every single person in the immediate area turn and spectate the interaction, instantly judging you as out of the ordinary. Really stretching the topic, even getting contact information is more difficult these days. 20 years ago you could meet someone, and they'd have no issue giving out their home telephone number. You'd ring them up and you could schedule to see a movie. Nowadays you are considered suspicious if you ask for someones phone number. I know people today that will absolutely not give out their phone number to anyone other than immediate family.If you are their friend and want to contact them, you have to do it over a social app like IG.
That and it can be hard to find people you fit in with well due to the rise of the internet and people staying inside. If you are a hermit and enjoy other hermits, you won't find them by going outside. Which means you are then stuck with trying to meet people online, and introducing yourself online is even harder than it is in person and met with the same hostility. I'm talking about guy > guy and girl > girl here. It's a whole different level of hell trying to befriend someone of the opposite sex these days. Most people assume you either want something sexual or unusual, not just friendship.