Is this you?
https://www.youtube.com/watch?v=mIm-p7a4xBI
If it is; you're decent. There's a few things you outright mess up on (priority of ability use, DoT uptime, CD order) - but since it's a No-tank run, those nitpicks can be written off. No-tank dungeons tend to focus more on the healer's ability than anybody else's, but still.
There are a few things that make me think, just from this example, that you are not as good a player as you seem to be setting forward in previous posts:
-Refreshing DoTs on an enemy that will die within seconds (many times)
-Not refreshing DoTs after they've fallen off a boss enemy until 3+GCDs later
-Using AoE skills at below the number of enemies that would make them worth using
-getting hit by AoEs
-tank-turning (controller)
Also, despite prior claims, you do not keep aggro consistantly while no-tanking. It's unfeasible to expect, but you claimed you did. And you do not.
Overall, from this example, I can safely say you are not as good a player as you set forth to back up your claims (as if they are relevant to the notion that "most people who choose not to speedrun are not good players").
This was posted months ago, so I'm sure you've improved since then. But overall, this is fairly low-quality play, if I am being perfectly blunt with you.
Again, I never said that everybody who chooses not to speedrun is bad. I just said that in most cases I have witnessed, that has been the case. And I can now chalk you down as "evidence" for that sentiment. I never really wanted to bring up personal skill, but since you did, I feel as though I need to address it.