Yes yes yes to all of this.

It's all about performance based mentality vs entitlement mentality.

No matter how much time you have to play the game, anyone can improve if they have the right mindset. These players are called toxic elitists if they would like to have tools that would give them valuable information on how to improve.

Like it or not, high end content in this game is performance based, and requires everyone in the party to have good teamwork, knowledge of your class, and skill. If you don't want to play that kind of content, then don't. The choice is yours. But don't deny people tools that could help them improve. As a solution, I would suggest only savage and ultimate raids have the option to parse. That way would promote less toxic attitudes I think.

As a healer I completely agree that content becomes resident sleeper boring. How they thought removing half of our DPS kit would be fun in any way still blows my mind.