You’re vastly downplaying the problem. There’s a reason a class action lawsuit went forward with tons of evidence backing up that it wasn’t simply the user’s error in properly maintaining the joycon. I’ve bought a joycon and had it started drifting within weeks before, even before I had kids. The sticks were just poorly designed, simple as that.
I’m not claiming it’s a standard maintenance practice, most people won’t have the spray, and aren’t accustomed to needing to needing to maintain a joystick like that.
But it is truly a simple, cheap, easy fix for almost all cases of joystick drift (not just on joycons, but all controllers). I really think nintendo should have worked to spread the knowledge, and provided free cleaner to people with issues.