It depends which devs you are talking about. You are absolutely right and bring up a great point. Reward pool for authors/curators already gave up 10% or so (I thought it was even 15%) for DHF to happen.
There are some devs like Leofinance who hasn't taken a penny from DHF and keep building for Hive and its community. I can only hope stakeholders can see it and at the very least vote for leofinance witness.