Reading was autocorrected to teasing in the original post, I went back to fix that.I had to read this twice. You keep talking about "pushing back" and "folding"- that was a simple compromise to fit the background into an existing campaign with minimum fuss.
Where are you finding these players who are so unreasonable that they insist to use backgrounds exactly as printed and refuse to allow the DM to adjust them to make them work? And why would any DM put up with them as players?
Your hypothesis that somehow WotC reinforces bad players without giving the poor DM any recourse is ridiculous in the extreme. No DM is forced to run a game at gunpoint.
The books tell players they can reasonably expect their background features to come up. The DMG tells the DM to work with the players to see if it's possible to make that happen, and even tells DMs that they can create custom backgrounds for their game if existing ones aren't up to snuff.
Games do not require giant block letters saying "THE GM IS KING" in order to be played. Any group that cannot compromise shouldn't be playing any game together, D&D or otherwise.
This very thread has examples of those players you are questioning. The trouble with your "compromise" is that this thread was just talking about revising ravenloft so a criminal taken from another setting by The Dark Powers could expect to use their background feature in ravenloft as if anything less was unreasonable, that is a very significant change to ravenloft with repercussions throughout the entirety of the setting. Your "compromise" is a total non-change, expecting A FR GM to add the dragonmark houses fallen dhakanni empire & shift to eberron style goblinoids is much more comperable to what the thread was literally suggesting a reasonable expectation for a hypothetical ravenloft GM to engage in when I brought in the eberron backgrounds.