Desalination is a different process to heating though, for instance the sea won't lose excess salt to the atmosphere.

The sea does lose salt to the atmosphere, just less than it does of water, so it doesn’t reduce salinity. Wave action releases enough salt to smell salt in the air, and a bit makes it up higher to provide cloud condensation nuclei.

Wow! I didn't know that.

It's a good thing the problem we're talking about doesn't exist there

Yes, as your article clearly explains the problem we are discussing - heat pollution - does not exist there. The article is talking about salinity, not heat.

I think the issue is that location matters. What can be a huge problem in one location, might not be a problem in another location.