I believe game engines like Unity and Unreal being accessible to more people is NOT an inherently good thing.

Whilst there have been some absolute bangers created because of the much lower level of accessibility, the gaming market as a whole has been flooded with low effort/technically unimpressive/poorly optimised games from less or none experienced developers.

By making the ability to develop games less accessible, you inherently require developers to have a much better technical understanding. In theory, this would mean new devs would have to be far more dedicated to their project (cuts out low effort shovelware) and better optimise their games

For AAA games, yes. Luckily we still have creative indie developers, even if you have to wade through a sea of shovelware to find them