Ehh. After a certain point that's true, but a lens doesn't help much with a garbage sensor, particularly one that has to be compensated for with huge exposure changes. (This is the core of why webcams are disappointing, not the lens.)

I use a GH4 or G9 with a USB3HDCAP at my desk because I already have them and the glass, personally, and I know the sensor is not going to be a trailing problem behind the (cheap!) glass that I use.