The used monitor system (speaker, placement, room) is also important to create great sounding profiles.
Why?
It's the same as with pictures - if you use a bad (calibrated) monitor - and use e.g. Photoshop to adjust the colors, brightness, contrast ... to get a nice looking picture ...
Then this picture may look nice on THIS ONE monitor - but very bad on all others - maybe even worse then the unchanged picture.
Why?
In case your monitor shows the picture with to much 'red' - and you "optimize" the picture by reducing 'red' then the picture may look 'green' on a well calibrated monitor.
The same is true for sound.
If you use a very bright monitor with a little bass - then you may tend to reduce treble and increase bass - or use microphones / a mic placement to get a profile with reduced treble and increased bass in the first place.
Unfortunately will this profile sound very dull and boomy on most other monitors.