So to conclude there is a chance that the max supply could be altered if the community vote passes by 51%?

Up or down? Max supply

We have no community votes, now. SPOs just install everything given to them by IOG. IOG would never change the max supply. If we couldn't trust IOG, we could just all walk away. Max supply of ADA changing is as unlikely as max supply of Bitcoin changing. But in both cases, it is not “mathematically” impossible.

There is a chance that the earth will disappear in 2 hours.