I see both your points, though in my humble opinion Patreon should backtrack and go the other direction... it currently attracts the wrong type of sponsors/patrons for what those means. If you are paying 5 or even 10 dollars a month for two years, the minimum for a game development, you've just handed 120 - 240 bucks for a game, that's still nearly nowhere close to bigger budged F2P games get spent on, but it's still the overcharging for a game. Now... if you paid the same money on the artist and didn't get the game until it's out, now we are talking.
Of course, that's a very risky business model, also one that punishes amateurs and those trying to earn while learning their craft or starting from zero, but it would stop people from bitching... especially if patrons would still need to buy the game once it's released.