Oh, they're more than a drop in the ocean for sure. Which doesn't mean there's not other things to address, where population is definitely not the main problematic factor, but consumerism is (and throwaway culture). This kind of whataboutism is fallacious, you can do better.

EDIT: As a small anecdotal point, any new human activity that is measured in GW of power consumption is not a drop in the ocean. Admitted, some of these data centers projects are "only" in the 100s MW scale, but all of this combined is increasing electricity consumption by a vast amount overall.

It's not just the data centers, but it's part of a bigger trend of massive industrial projects depleting natural resources for questionable benefits for humanity. There's basically two approaches to ecological problems: either pretend some wonder technology (AI?) is going to save us all and keep driving straight into the wall, or seriously question any industrial activity in a cost/benefit analysis.

Our society is currently headed in the first scenario, building ever more useless shit and accelerating environmental collapse, pretending CO2 capture, AI, unlimited energy storage, agro-bots, desalination and on-site recycling of complex materials will magically keep life sustainable despite any scientific evidence showing otherwise.