I am part of the target audience for emboldened, so I want to share my experience:
When raids first came out for GW2, I tried them. It took me 3 months of training and practice to beat VG, and I was so burnt out that I stopped playing for quite a while. Now, to be fair, I had wrist issues at the time and could not use a mouse, so that did genuinely hinder me. However, disabilities are a very real thing.
A couple of years later, I came back to the game at the same time as a bunch of old guild mates, so we refounded the old guild and recruited some new folks as well. Many of them had never tried raids, so we learned together. (By this time, my wrists were doing better, so I was able to use a mouse again.) It took 6 months to get all the bosses of the first 4 wings except Deimos. It took 3 additional months for me to get Deimos, but some got Deimos separately and had attendance dropped off.
I'm not the best player, but I did learn and get better. I went from a bad player to a mediocre player with a bad case of tunnel vision.
Along the way, I've encountered a number of players who believed that any failure was because people did not understand the mechanics and refuse to believe that anyone who understood the mechanics could fail. There's something to that, but it's not entirely true. I remember learning Sabetha and would frequently miss the throws. It's not that I didn't know where to throw it. It took a couple failures for me to figure out that I was throwing short and that I needed to run forward a bit before throwing the bomb. Technically, that's part of the mechanic, but generally not something covered in an explanation or video. It takes practice. Even knowing that, I can screw up 20% of the time. That's a failure in execution, not at knowing the mechanic.
The other thing I encountered are people who join from LFG but quit after the first attempt fails -- even though the description clearly said TRAINING or STILL LEARNING. Do I think those people would join an emboldened run if it has reduced rewards? No, I don't.
Why would anyone accept reduced rewards if they can defeat the boss without emboldened? Except that if the community thinks that way, then it will be incredibly difficult to fill out a missing spot on a training run, which makes raids less accessible and defeats the purpose of emboldened if people refuse to use it.
Do you deserve more for being better? Sure. However, by getting the same amount much faster, you get more rewards per hour -- those are your increased rewards. And that's why people from LFG bounce after the first failed attempt. Reduced rewards from emboldened would only make the problem worse.