Why so many variants?

I understand they wanna keep the game going and make money but why do they have sooooo many variants of reqs it seems so unnecessary.Does a scout warthog and ar/smg/dmr/regular warthog/br need that many? Could’ve added.
Brutes drones brute weapons or vehicles andddd they add more warthog variants o boy!

Because micro transactions.

Honestly the only reason i leave the arena is to burn those variants and giggle. Void Terror is just silly fun. I like it.

I want a Purple Warthog! Until that is out the game is not complete!

So that you have to grind and spend more to get more of the variants hehe