I understand where you're coming from, and agree that it's bogus Tapas has to follow the app guidelines anyway while bigger companies get away with more, but I was simply reiterating the statement that just employing the M tag for any sort of episode won't automatically remove the series from app searchability.
And ratique has notified me that Tapas does indeed review every series with a team of moderators and ask creators to censor anything that breaches app guidelines, like a stray penis or something. While they may not get to an episode the moment it updates, they do see to it eventually.
I certainly don't feel this is the case though. This list was only brainstormed because people have asked for mature content specificity when marking their episodes in the past, and as Tapas tries to listen to creator wishlists they thought this was the time to implement that.
Tapas app is also rated 17+ so it's not really for the sake of 'the children' but rather it's more of a functionality that's beginning to be standardized. With this, people will start to learn where to look for the content warnings. Before creators could put them in descriptions, at the top of episodes, wherever. This is intended to streamline that.