Arguably it is better than mining for coal, lithium, etc. since those have similar issues, but one gram of uranium contains energy similar to 3 tons of coal.

Fairly so - it isn’t emissions, and does not contribute to the problem in a meaningful way.

The reason why emissions are dangerous is because they trap solar heat at large enough scales to change the global climate. Server farm heating isn’t really anywhere near contributing at that scale.

That’s only “longtermism”. EA as introduced by Peter Singer in “the life you can save” is an incredibly sincere and well founded philosophy of charity.