I love both Tool and Dream Theater and I don't agree with either points you make. That being said though...
Tool are not overly pretentious to me but I can see how Dream Theater can come across as being a wankfest. I look at it like this, as Lateralus said with artists being dramatic, Dream Theater just like to create big epic pieces of music. They can also create songs that are more accessible though, and aren't afraid to do that.
As much as I love Dream Theater and the song 'The Count Of Tuscany' there is a part in the song that annoys me, just before the final closing part (my favourite part of the song). Before the end there is this really mellow trippy instrumental moment, it goes for far too long in my opinion. Watching them live everyone was really into the song but when that part kicked in it was like a buzzkill. Maybe they just wanted to throw everything into that song. Besides that it is an epic close to that album.
:clap: