just because some exchanges added BCH to their platform it doesn't mean there is more usage for it. it just means it is getting pumped and dumped more like a lot of other altcoins.
Why do many users choose Bitcoin cash?
why do YOU think it is chosen by users or used more?
and remember to check their empty blocks which has only a couple of transactions in them!
I think the following reasons:
Better security
Improved scalability
Scarcity of supply
Improved confirmation time
Lower cost
the only thing that BCH changed was the blocksize. and the only thing that increasing blocksize does is that it "improves scaling by a little". the rest of the things you mentioned are either wrong or is the same with bitcoin like the supply.