Wouldn't generalize this; I think there are also factors like game performance (FPS) that are at play. I can play Beat Saber and HL:Alyx just fine on the Vive without any issues whatsoever, but whenever I want to give 'Blade & Sorcery' another try I feel absolutely terrible after a few minutes of gameplay. I do think it's poor performance (low FPS and 'location stutter' where the game seemingly can't decide where to place me exactly) are the cause, but I could not place a finger on when/where exactly the threshold is where I start to feel sick.
Yeah - performance is an issue here (I've worked on VR tech before). What I'm suggesting isn't that developers are getting it perfect, but that we have technologies and techniques that make it work at scale (without people being sick).