Ya, so? Even if automation is only going to work well on the well understood stuff, mathematicians can still work on mysteries, they will simply have more time and resources to do so.
No.
>You can
Not right now, right? I don't think current AI automated proofs are smart enough to introduce nontrivial abstractions.
Anyway I think you're missing the point of parent's posts. Math is not proofs. Back then some time ago four color theorem "proof" was very controversial, because it was a computer assisted exhaustive check of every possibility, impossible to verify by a human. It didn't bring any insight.
In general, on some level, proofs like not that important for mathematicians. I mean, for example, Riemann hypothesis or P?=NP proofs would be groundbreaking not because anyone has doubts that P=NP, but because we expect the proofs will be enlightening and will use some novel technique
Note on the other hand that proving standard properties of many computer programs are frequently just tedious and should be automated.
If you've ever worked on a proof for formal verification, then its...work...and the nature of the proof probably (most probably) is not going to be something new and interesting for other people to read about, it is just work that you have to do.