Everybody house ruled and added to OD&D. You needed to. But even in AD&D where we pretty much stuck to the rules we played much the same. There have always been options to have relatively low lethality games if it's what you wanted. Not using some of the save or die options because it wasn't fun for us, if that makes it house ruled (I disagree) then all I can say is that when I started playing with other groups after high school they also ignored those options. D&D is a toolkit, bypassing some of the tools in the kit was very common in my experience. For that matter, if I wanted to kill off PCs in 5E it's not that hard even at mid-to-high levels. Double tap and if there's a cleric with revivify drag off the body. Better yet, target the cleric first.
I don't think it changes anything whether or not we house ruled and made the game what we wanted. Isn't that what everybody has always done?