I'll try to explain a bit...
You don't need to compare yourself with other players to improve your dps/healing.
For example, if you can use a dps meter and you want to test new build, you can go into a training area.. there you heal / attack a training dummy and you'll see that you are doing 4k damage/second.
Okay.
Now you can change a trait and you can see your damage raising up to 4.2 k each second. This means you actually found a way to improve your damage.
You can also heal/damage multiple dummies... maybe you are doing 12k damage/s and, same as before, you can try to change your weapon or a trait or even a specialization and see how is that going (14k= better, 8 k = bad).
If you want to post your build in public build/guide websites you can add a message like "with this build I can do 16 k damage using this rotation etc."
If another player want to try your build, they can go into the training area and check their damage.
If the damage is under 16k they can still play and no-one can blame them because, outside this "training" area, the dps meter plugin is disabled for everyone.
Am I making myself clear? 😄