It's a great question and should be welcomed; anyone starting a flamewar will be dealt with appropriately, I'm sure.
Critical listening and listening for pleasure are two different processes in my opinion and experience. The vital factor though and one which, if missed, can lead to an expensive merry-go-round of hifi purchases and sales, is forgetting that the first is purely a route to finding satisfaction in the second. Critical listening is brain-led, listening for pleasure is heart-led (this is not biologically accurate).
Some don't do critical listening and some do, but the ultimate purpose of a hifi system in a domestic setting is to provide personal (and/or collective) listening pleasure. It's where measurements simply have to lead (what on earth is the real world point of having something which "measures well" if it brings no listening pleasure to those who hear it?) and it is where all critical listening should lead.
It can take many of us years to start to truly understand how to audition against not what is impressive but what moves us. I've made big mistakes here. Whether it's the brush of a cymbal, the pluck of a double bass or the boomph (yes, that is now officially a word) of a bass drum, there is a danger we can confuse initial impressiveness with long term enjoyment.
Once you have a system you feel you are genuinely happy with, this is where the reclockers and network switches and other peripheral (not in the computer sense, folks) devices can (they might not in your system) make a genuine contribution. Their difference is usually relatively subtle compared with say changing your amp or speakers, so analytical listening struggles, but live with one in your system for a week and then remove it and sometimes something just doesn't feel right - a sense of ease or of excitement or whatever is missing.
A reclocker in my system was at the subtler end: hard to pin down the "why?" but I definitely didn't enjoy the system as much without it so it stayed: that sense of just being right.
The network switch was, surprisingly, more impactful; I invested £30 on a punt, knowing I could get at least £15 back. It wasn't going anywhere once I'd heard it; greater clarity, more kick in the bass, lots to like and nothing to dislike. I simply didn't see that coming.
As I say, the vital point is to understand what connects our analytical/critical listening with our listening for pleasure. The first is simply a means to an end, but we do have to educate our brains to appreciate what our hearts desire!