Comparing 24/7 AI training to operating hospitals 24/7 is a bit of a false equivalency, don't you think?
Besides, hydroelectric is commonly used as baseload where available. Additionally, there are big strides happening in power storage options to smooth the effective baseload of solar and wind.
I would argue that coal energy only makes sense in an anachronistic society doomed to fail.
Where available is limited to Norway. Building enough mountains per capita in the rest of the world is somewhat difficult.