The only games where micro transaction should not be, are monthly subscriptions. I'm already paying money to play, I don't need to pay more to get further ahead faster. However, it is perfectly fine with micro transactions in one-time purchase games. Such as Destiny or ESO (after it went free to play of course). Besides, it's not like they are going to be offering 350 attack weapons that are unobtainable otherwise. This also gives them reason to give you content that you would otherwise purchase, for free. If you are against the idea of free stuff, you are automatically wrong.