> What is the renewable alternative for the cement, steel, shipping, and aviation industries?

For steel the possibilities are hydrogen or electrolysis, both are being tested by some companies. You need the political will to price emissions to make it profitable though.

For everything fuel-based synthetic power-to-x-based fuels are a (costly, but CCS isn't cheap either) alternative.

Cement is the biggest "we don't really have any good alternative, at least not any time soon"-issue.

I agree that there's a role for CCS to play, but I think it's not helping that its advocates have played the "we need CCS for X"-cards a bit more often than justifiable.