Highest fees will not make investor style people filthy rich as an automatism. Most if not all of them are totally neglecting that they aren't pool operators.
Users that are operating a just so tiniest amount of negligible hashrate tend to fall for a similar illusion. Dreaming of ROI, even.

But mass adopter's attention will be drawn away from even considering Bitcoin if they get a glance onto horrenduous costs for using it.
And we know Metcalfe's law and the network effects that give value to any digital currency. Most of the coins are lacking on that, never gaining any potential. Bitcoin has it as a first mover, but seems willing to risk it's foundations.