Limitations in physics: nah we can spew negativity, don't need to mind those.
Limitations in the flavor of webmeeting software used: nah we can spew negativity, don't need to mind those.
All they want to do is spew negativity all over the place, not being held back by reality.
Really if you want a better picture out of that 720p camera: turn on the lights. Brightness in the room makes the job of that minuscule sensor and tiny lens a lot easier and with picking up a lot less noise.
And for those instance that you can use 1080p or 2160p or so: get a decent external camera with a decent lens and light setup - most call the place where they set that up a studio, not a laptop btw.