Why do people think you need a giant social movement to search for obscure things?

[AspieMillennial]

This mentality is foreign to me but I see it a lot in other generations. I've been told "You're a civic and civics aren't known for looking for stuff on their own. They just like big and corporate." and about how other generations are the ones who made up movements to rebel. But I don't have any time to wait for some other movement who will probably reject me anyways for the age group I'm in. Why is it less valid to search for things and find meaning on your own than it is to do so as some part of a big movement? People are telling me my experiences do not exist or matter. Once they hear a generation their mind goes blank with buzzwords. There are plenty of places to look for everything yet everyone tells me that what I do doesn't exist or that my own personal experiences do not exist. That I MUST be defined as what's out there now just because my parents fucked in some random time period. It all seems arbitrary and absurd to me. I'm a loner by nature so it's easy for me to define my own interests. I don't see why that somehow doesn't exist just because I'm not a part of this giant movement.