Because that was pre-casual mobile gaming revolution that happened right after 2010 or so.
Most gamers today are casual gamers who play cell phone games, and by effect many contemporary PC gamers are people who “leaked over” from that mobile demographic.
It’s kind of like when a big Olive Garden moves into a town’s local entertainment area, within a few years lots of patrons who visit the other restaurants that have existed in the area are going to expect to get free bread sticks with their meals. The “bread stick effect.”