These games are meant to be ridiculous. What pisses me off is dishonest devs trying to pretend these games are so much more than just fan-service porn.
In DMD (and many other games), there is a 40ish male MC. This guy rarely has a "stable" of fuck-mates at his beck and call (in DMD the MC had no traces of a pre-MC sex-life since his divorce). But if only the player {who the devs rather safely assume is a nerd rather than a stud} immerses himself into the persona of that MC, he will quickly collect an exclusive harem of submissive lovelies. This "stroking the ego" presumably leads to other forms of stroking.
The way to understand these games is by reverse engineering. What outcomes are desired? Often, the story details and character traits get mangled but the outcomes don't change. It's a con-job : there is enough logic involved to "convince" people that there MUST be logical reasons for everything. Nope. Devs don't want players to "sherlock" everything out, so they resort to smoke and mirrors. There are so many fanbois that they eat this up as if repetition alone--"logic", "romance", "slow-burn"--is some kind of higher truth.