Yup, though I think plenty of folk appreciate both ideas, not just simulationist OR gameist.From what I can tell, folks who are opposed to this idea fall into two camps.
One camp rejects it for practical or simulationist reasons: it's a fire hazard, it's not very reliable, your own body will block half the light, etc. Lanterns on the belt are a bad idea because you'd burn yourself all the time, possibly seriously, and for little benefit. (This is my camp.)
The other camp rejects it for gameist reasons: darkness is an environmental hazard that the character(s) must overcome, and overcoming it should carry a cost, and that cost is usually a free hand or a cantrip. Lanterns on the belt are a bad idea because they allow you to acquire a light source without paying the game's "cost."
Is that about the shape of it?
For me it's a gameist thing, but I appreciate having the simulationist reasonings.