Machinist needs help.

[CKNovel]

Why anyone will play any other class if ranged DPS classes in this game did the same damage as everyone else but with best movility?

Yes.

Once again and it's been proved thousands of time:
Players play what they enjoy the most, not based on meta. That's only for metaslave.

It's been proved countless time, even when DNC and MCH are crap compared to BRD, yet they remain played.
Sure, BRD is more popular but has always been more popular and we're far from 100% BRD.
Same goes with SMN, RDM is more popular and regardless of any counter-argument, BLM remains played by many regardless of RDM/SMN mobility