It is not the hopper's fault that there are miners who submit shares with low EV. It is, however, the hopper's fault that there are miners who submit a disproportionate number of shares with low EV. That wouldn't happen if there were no hoppers. (Unless you had some kind of crazy reverse hopper who specifically chose to disproportionately submit shares with low EV.)
True. But submitting shares with low EV is already a mistake
They are forcing you, because someone has to sell shares to the pool for cheap or the pool will stall. And the hoppers aren't doing it. They don't force any one particular person to do it, but they force someone to do it. (Or the pool dies.)
Daaa. If the pool uses crappy reward system then let it die or change the reward system to be fair. There are other pools with fair reward systems. If you are ok with getting low EV then don't complain about hoppers, if you are not ok with the low EV, then nothing easier, switch to a fair pool.