While that is true, in Genshin Impact at least, the main game is so easy it's not really an issue unless you choose to be a min-maxer, and there's no PvP competitive aspect. You can beat the abyss full f2p, but it will take a bit longer to get there (as someone who has been a denegerate min-maxer in other games, I have no interest in pushing for it myself). The worst whales I've seen are those who get emotionally attached to a character.