How do web-analytics[beta] help my site?

I have enabled web-analytics for a couple of days to see how it works. Apart from the requests breakdown based on countries/browsers/device-types, there is nothing seem to interest me to move out from google analytics (which I really want to ditch).

Even though this script seem to send details like load timings, CLS, FID etc, none of them seem to be presented in the analytics report which is what I am most interested in.

So my question is, is there any reason why I should use web-analytics not other tools? Also how does it help my site in any way?