If it were a level playing field I'd be inclined to agree with you, but it isn't. These companies are hiring specialists in the psychology of creating a sense of need where there is no need. It doesn't work on everyone for everything but there are people who are susceptible to these techniques and they're the people funding everything. The issue isn't people spending their money on what they want, it's them being put in the situation where they feel compelled to purchase things and encouraged to do so by companies who know full well that these people can't handle it and will cough up the dough no matter what comes their way.

It's OK for people to spend as much money as they want supporting [gambling]. If you enjoy the work that a developer does for a [gambling service], it makes sense to fund their business.

Would you feel the same about your paragraph with these changes? Destiny 2 used to have full blown loot boxes after all.

I think it is important to still ralley against predatory mtx mechanics even if they don't work for you. Other people don't necessarily have full control over their own spending habits and by allowing these systems we openly allow developers to exploit these people. Luckily we started having laws against gambling mechanics (although Gacha is still a thing), but there are still many other psychological tricks at play for almost all of these shops.