You could argue against the relevance of video games to FA, too - but I don't think TFL's going anywhere soon. Cars (and motorcycles too) are not an uncommon topic, in Rants and OT both. Can you say that martial arts or dance are the subject of as many threads? I doubt it.
The fact that Lynx Plox still exists clearly indicates that FAF has no problem leaving mostly useless forum sections around anyway.
Video games and technology generally go hand in hand with the furry community as it's very computer/internet centric.
The tube, a little less. However who doesn't listen to music or watch tv?
Politics is also a common subject, should we have a politics section?
Religion, I see popup more then cars, should we have a section for that too?
Yes, Cars pop up a lot in Rants and raves, if you make a another subforums you'll get all the "MY SHITTY OLD CAR BROKE DOWN OR I HAVE NO GAS MONEY" there, what the R&R is intended for.
Lynx plox is there so it wouldn't flood Offtopic with useless threads, and they don't want to ban the "hey look at this funny video" threads, since the human race seem to spam links in every IRC/STEAM chat channel they are in when it's something funny(but often retarded).