I think it's more like it's illustrating the importance that being unable to see what other people are talking about online because you deliberately skip over all the additional posts people have made to illuminate their ideas makes that person's reactive comments much less useful or worth considering.I intentionally skipped over reading the rest of the thread so as to illustrate the importance of being able to see what others cannot.
In a limited visibility environment (such as in a dungeon,) being able to see without light sources is even more of an advantage. Ambush, stealth, and surprise can heavily tilt combat in one side's favor.
Even outside of combat, having a hand free that would otherwise need to be holding a light source is helpful.
So yeah... you have not convinced me of your argument with your isolated two posts. Sorry.