Boys interests are really varied now so all these saying football is the thing they do and it’ll be a barrier if they don’t, isn’t something I recognise from my sons/friends sons/nephews experience of school.
I’d say the one thing, if anything, that helps at school, as so many kids do it now, is gaming. Having a console or PC, more a console, was definitely more common than playing any sport and was something kids talked about from year 4 a lot, right through all of secondary. My son didn’t play football out of school from age 10 ish but could still play in the playground if he chose to.
As for every boardroom and bar, that’s not playing football so much, that’s just following a team, if it’s talked about. Lots of kids follow a team, without playing football themselves.
My partner has found his colleagues are as likely to talk about rugby and formula 1 as they are football. And also when a couple of big companies he has worked for include US offices, if sport is discussed, English ‘soccer’ isn’t a big topic for them. There’s also a lot of women at work now, including in senior positions, some may like sport but it’s still not as common so it’s not a huge topic of conversation.
My son is a college now, he says gaming, music and TV shows are what is talked about, not so much sport.