vertex rounding visual issues?

[cheap plastic]

I've heard of vertex rounding and how it may fix some issues with very thin black lines. It never described any downsides, so i tested to see what it would do. When i did, it would eliminate those thin lines, but i would notice any horizonal movement on the screen would be warped, and look very off. I am showing some videos of what it looks like when i turn it on; notice the nintendo channel text on the bottom left, and how smooth it looks without vertex rounding. Im not sure if this is what it should look like, or if one of my settings contrasts with it, but it just doesn't look right.

how it normally looks: https://drive.google.com/file/d/1HVp9AUIdN8y3ov4IjUMTzobsDlercWF3/view?usp=sharing

with vertex rounding: https://drive.google.com/file/d/1AuztkDZaGRlV_Hf2nJbUkIbjTmQgy-uG/view?usp=sharing

[JosJuice]

Vertex Rounding makes certain things better and certain things worse. You've ran into one of the latter here.

[cheap plastic]

I was just wondering why no downside was listed anywhere, cause given what it looks like at 4x resolution, i dont think i will use it for these issues