Well, there's only 6 knobs and if you want to be "in tune with the world" those six knobs can only be in one place.

However if you want more notes than that to be their best you're going to have to compromise and work at it a bit.

Now if you want the instrument to sound its absolute best on its own solo, a slightly different place for some strings.

And then depending on other musicians you are playing with and the way their tuning has achieved perfection (or not), some further tweaking can make a big difference.

And that's after accepting that the "knobs can only be in one place".

For students to get really good at the tuning process can require a few extra years of everyday practice more than it does to learn to play a few pieces.

Part of the limitation is the way only a few minutes of tuning are spent for every hour of practice, if that.