It is not incumbent on WotC to put special rules in special places just so DMs can avoid "feeling bad" about telling their players what rules they are choosing to use in their campaign.
If (generic) you are a DM and you want to run your game with less whac-a-mole healing and you have a special system you want to use to do so... then step up and tell your players that's what you're doing. They'll either go along with it, choose not to play, or want to discuss it with you and figure out why you're doing so. At which point (generic) you will have to defend your decision. Which is exactly what you should be doing any time you decide on which rules of the game you are going to play with. Own your decision and defend it.
The one thing you shouldn't do (and WotC is under no obligation to make it easier for you) is to just point to the PHB and say "Oh, well, you know, I don't WANT to make this game feel more difficult for all of you, but you know, these rules are right up here in the Player's Handbook and I'd like to give them a try... and because they're here in the Player's Handbook, then you know, all you players should be okay with giving them a try too. It's not me! No, no! WOTC put these rules here in the PHB! So blame them if you don't like it!"
Stop trying to make WotC be the "bad guy" because (generic) you are unwilling to actually talk with your players and tell them what you want to play.