1. It brings all the music up to the same levels. In this way, it's a bit more 'democratic' with the music, all the parts will be equally hear-able.
Yes, because it all sounds like white noise.
2. they falsely associate 'aggressive' music with loudness wars
But the loudness wars were real.
3. Related to my second point, the real hear-able issues due to the loudness wars are incredibly minor, psychologically.
You may think so, but a lot of us don't. The heavy compression (and this is audio compression, not digital compression, which is a completely different thing) destroys the quality of the sound. This is an objective truth. Perhaps that kind of crushed sound might be desirable by some artists as a style or effect, but when old music is being remastered to have no dynamic range and to clip, it is severely damaging to the quality of the sound and the ability for a listener to hear everything in it. That definitely has nothing to do with changing tastes, because we're talking about the same music.