I've heard a few horror stories on how difficult it is https://rog.asus.com/forum/showthread.php?81931-G752VT-CPU-reaching-100-C-after-re-paste-!
I'm here with 2021 hindsight and a community 5 years older. My paste is 4 years old, it must be replaced. Is repasting truly as difficult as the post says?
Other than the meticulous tear down that gets easier every time you do it (ive had lots of practice) this isnt an overly difficult task.
I did my G752V?Y not long ago and the longest step was the few fingers of 18YO scotch afterwards. You shouldn't have to bend or shim anything unless you screwed it up taking it apart. There's probably a dozen tear down videos on you tube for every laptop ever made. Start there, watch more than one to get an idea of what you are getting into. The hardest part is keeping the screws etc organized so you know where things go back. My actual labor time on my G752VY repaste was about 20 minutes but I've had practice tearing it down to do other things like adding ram to the non accessible area, replacing the WiFi half PCIE card and the real PITA when I had to tear it down to get to the CMOS battery.
The post you linked made a mountain out of a mole hill.
+1 on the Kryonaut. My go to paste for everything.