people shouting that they care about the environment, while being silent on things like beef or flights etc. are being hypocrites

As others have said, most people that take issue with AI due to its negative impact on the environment will also take issues with those other things. Of course one might argue that to some extent pollution is acceptable for the purpose of producing food, while to a lesser extent for the purpose of powering magical text completion toys.

I’ve seen many people say AI IS BURNING THE PLANNET, when that is simply not true

How is it not true? You’ve agreed that it has a negative impact on the environment. It’s not burning the planet on its own, but its contrubution to the burning is non-negligible and only expected to grow. According to all scientific findings, we have to reduce our carbon footprint, not increase it even further, to make the impact of climate change maybe somehow bearable. Therefore, everything contributing to an increase has to be scrutinised thoroughly as to the value it provides net its impact on pollution. Currently, that calculation results in a net negative value of “AI”.