While you’re right in some cases, many of these companies want lots of ftp players to keep the whales playing, as it gives them people to play against. Any empty game is no fun for anyone.
I stopped playing brawl stars maybe a year ago. That’s 4+ years of playing a game without spending a cent on it. It was a similar thing with clash royale and clash of clans. I never felt I hit a paywall. Pokemon go I still occasionally play, and never spent s dollar.
I agree that they are parasitic, as they take advantage of people without impulse control, but they’ve been great for me as I get access to high quality games without having to pay.