To keep it short, let streamers disable ads entirely.
Not all streamers want to make money off of streaming, but with all the fun interactive stuff (channel points, emotes) locked behind affiliate and thus - monetization - some streamers feel like they can't do much unless they make the leap.
But, naturally, smaller streamers can't really grow an audience if they're either A) stuck rolling pre-rolls or B) Have to manually run ads themselves. I'm sure you've seen enough complaints about pre-rolls and mid-rolls that I don't need to elaborate.
The Stream Display Ads were a nice idea.... but since they don't contribute to disabling pre-roll ad time at all, it's basically worthless.
Therefore, there should be a way to let streamers have the fun interactive stuff like channel points and emotes, but not be forced to push ads.