Measuring the mesh cold is a waste ot time.

You say that, but it’s a hell of a lot better than nothing. I remember the days of not having no Z-probe on my other printer and not being able to use more than (generously) a 3"x3" square of my 8"x8" bed without really bad bed adhesion issues and no amount of manual leveling would help. Even on the aforementioned Ender 3 V2 Neo, I almost never have bed adhesion issues. My estimation of my experience is that leveling a cold bed is about 97.5% as helpful as leveling the bed hot.