Nvidia don't sell a PC part that is lower because it not economical for them to compete against integrated solutions that come with the CPUs found in such PCs
not because those integrated solutions don't exist or gamers never use them. Again, Intel, AMD, and Qualcomm all sell such solutions at a variety of price points (with the first two making up almost all of them).
From what I can tell from steam hardware surveys that's about 10% of the market though naturally they don't necessarily represent the bottom 10% of performance since some people are rocking extremely old discrete graphics cards.
Basically, you guys keep misusing the word "low end".
Of course not?