No one should gerrymander.
I think there would be a lot of support for passing laws requiring specific non-partisan or bi-partisan redistricting though. There are a bunch of states with systems in place like independent commissions that can prevent the worst abuses. I think preventing the worst abuses can only really help the Democrats.
Now, what we could and should ask for is for every democractic legislature to pass the National Popular Vote Interstate Compact. I'm pretty sure we have enough states now to make this happen.