This is all true, and fair, but I think that there is a fundamental distinction between
talking about RPGs (such as we are doing here), and
playing RPGs.
It's perfectly possible to play an RPG without having a shared language that requires discussion on a forum. Moreover, I think the entire point of many rules-light systems is to concentrate on playing, instead of those extraneous discussion.
Again, I think too many of these conversations come from a position of one-upmanship; the need to defend (or attack) a mode of play. But it shouldn't be that way! There are advantages to systems that rely on more rules, and advantages to systems that rely on less. I think that many people who play for long periods of time likely experience both, and enjoy both at different times.
Personally, I think it was fascinating that we have an OSR-offshoot (Worlds Not Rules, or FKR) that is looking back not just at rules-lite, but at purely minimalist rulesets. But the beauty of the hobby is that it can, and should, support a multiplicity of play options.