It's more about users not giving a damn which can already be seen with users using 'all' feed downvoting or responding with unfitting comments to things that they should have just ignored but didn't because it showed up to them.

If the user visits feed expecting specific content just like they'd expect from community and treat it as such there's a good chance they'd contribute but not in positive way.

The feature is in a testing phase to find bugs and collect ideas and will be improved with time so such problems would hopefully be minimised. In which direction will the feature progress is something I don't know and from my understanding the devs don't fully know either but they're definitely interested in allowing more control over things like community opting out (or in?) from a specific feeds as a second option besides opting out from the feature completely. In what form the mods will have the tools to control to which feeds their communities belong I don't know but there's a lot of interest in it.