That isn’t a good justification to me. If it’s ok for you then it’s ok for the rest of the world too. You might believe ads aren’t bad and that’s fine. At least we can agree to disagree on that as our opinions aren’t reconcilable. If your app can’t exist without ads then I don’t believe it should exist at all. Or any other software in the world.
I’ve been seeing this a lot lately. Lots of bandwagoning going on. It is what it is though. People are fallible and often just follow the herd instead of thinking.