100% agree with everything you said.
Beginners think OR hear that rapid is best for improvement and just copy each other, but in reality if you play 5|5 min constantly you will improve much more because of increment , then playing 10|0 so officially blitz is better for improvement!
But I do agree with you , that it's not as popular and 10|0 is not rapid etc... I agree with you
So my point is it depends and not just rapid is better ....
Exactly I agree with everything you said