Other nerds don't have to care about the same stuff as you, they just have to be interested.
I am still tight with my group of 7 guys from school and we are all nerds but hardly share a single interest. We are interested in hearing about each other's niche shit and that's what keeps us together.
> I am still tight with my group of 7 guys from school
While that's nice and all, it's not super helpful advice for people who are trying to make new friends, as we cannot go back in time and repeat school from younger days...
Ah, but the parent made the explicit point of trying to find people they have two specific topics in common with. To argue that they shouldn't, doesn't help them in their quest for what they are specifically asking about.
It's ok to want to look for people with common interests, just as it's ok to feel it's enough to spend time with people you don't have a lot of common interests with.
I am still tight with my group of 7 guys from school and we are all nerds but hardly share a single interest. We are interested in hearing about each other's niche shit and that's what keeps us together.