The statistic presents the number of active PC gamers worldwide in 2020.
www.statista.com
According to Statista, which seems to be a reliable aggregator of data, over a 2 year study, they've identified that over a billion people play games on PC. They provide sources but I'm not interested in paying for it to check it out. PC provides a democratized environment for games - since it is not tied to one manufacturer or provider, people can build PCs on the cheap and play free (not just f2p but actually free) and affordable games. In huge markets like China, Russia, India etc PC gaming is very prominent, both because of the cost of consoles but also the lack of marketing/legal presence of those consoles. Growing up in the middle east, consoles were always unavailable or inaccessible to me, whereas PCs were. I built my own PC when I was a kid by scouring flea markets and second hand electronics stores for parts. Microsoft consoles were not available in my country because they did not have distribution. Playstations were available through luxury importers but they were obscenely expensive. With PC, I could build something that was in my budget and play the endless free flash games, f2p MMOs, abandonware, shareware and free indie games from the pre-indie boom. Consoles are a luxury good of the privileged world. I mean, a PC is a luxury too, but you are much more likely to have a PC at home for the purposes of work that can also play some games. Throughout the years consoles have become more affordable and available, but in many places a console is still not an affordable option whereas you can build a PC affordably. Not everyone wants to or can play the latest big budget games, and PC provides a place for people to find something to play that is not tied to a subscription that is still affordable. And those games are just as valid as any other game, and the people who play them are just as valid.