Why wouldn’t you just mine the most profitable thing and quickly buy RVN?

Serious question. If you love accumulating as much RVN as possible why wouldn’t you just mine the most profitable thing like ETH or NiceHash and then use what you earn to quickly buy more coin on the daily or weekly!?

I was mining RVN buy recently moved and when I setup my rigs again started to mine with nice hash instead and I have been able to triple my average daily coin count since I swapped.

Any reason why you wouldn’t do this if getting the most coins possible is your end game?