Well not sure here.
I use one, but sometimes I turn it off and I play manually (and I play manually brawl and tournaments almost all the time) because I like the game, but sometimes I must use it because I don't have time to play manually ... and if I don't play I'm losing possible profits.
Imho the problem is not the bot used by a single player who usually owns cards, with staked SPS and so on, but the bot farms that drain the pools with K accounts and zero owned asset. These farms make $$$ every season and they aren't part of SL economy except for rentals.