The game was combinatorial search from the start, so you could argue that it did not degrade the game, but it dispelled the illusion that it was deeper and something more than a sport.
Computers will undoubtedly become so good that computer + pro human would be like pro human + amateur, where the amateur has the final say about which move to make. The best strategy is to just do what the computer says.
This has become the case in Chess [1]. However, it took 15 years for that to happen. Chess engines now are orders of magnitude stronger now than they were when Deep Blue beat Kasparov. So this is definitely the case, it'll just take a while.
If humans + computer beat computer, id feel pretty content as a human being.
Eventually if the game is computationally solved that will dispel,but wouldnt that happen with basically everything?