Because solar on the roof won't even be noticable against their power footprint. Given current practices, each square foot of a datacenter would need about 1,000 times more square footage worth of solar.
It's just that somehow if they get to go to space, they decide they suddenly just need like two servers in a 'datacenter' instead of thousands. And they need to go to space because Elon says (checks notes) that it's too hard to make more natural gas turbine parts....
I guess the point would be what does the local area get in exchange for losing their forest?
A lot of other developments at least provide the local populace some service or jobs. These are just "give me your land, your power, and water and we will use it to advance our business interests and do nothing for the locals", oh and btw, give us a tax break for the privilege of having us build a datacenter in your area.
Now I'm being bombarded by ads saying 'um, actually datacenters give you tons of permanent jobs and makes power cheaper', so they are just flat out lying instead of actually doing anything to make it worth the local community. Well, except key people on local town councils who somehow end up with NDAs forbidding them from disclosing what conversations they are having with these developers...