2. 7. Nd5 line is not boring, it's one of the sharpest things to play against Svehsnikov, with pawns marching on both sides of the board. Mainline Sveshnikov on the other hand can be very drawish, with maneuvering play, where no side has a pawn break in sight.
3. It was the beginning of the Leela era, with many new opening concepts. It was a short-lived golden age, with players excited to try new ideas. After this match Magnus had a second peak, incorporating new knowledge, and won quite a lot of sharp games in Sveshnikov.
4. Well, game 12 was interesting, but EV of extra time to relax and prepare for rapid games with Caruana in 2018 was quite high. Fabi wasn't a very good rapid/blitz player back then.
5. Carlsen-Nepo WCC was a massacre, while the games were quite boring, except a few at the beginning. That match or any of the next matches would be a much better example for a case against classical chess.
I myself quite like chess960, and it's clearly the right direction. Opening prep is absurd now, especially at super GM level.