If a sukkah is to be compared to sleeping in the same room as a Sefer Torah (permitted if there is a mechitzah…) “Im keim batalta toras sukkah”, since the sukkah was given with all of its kedusha, specifically to be a holy place where one is tahshvu ken taduru. If it were simply like sleeping in a room where there’s a sefer torah, fhere wouldn’t be a mitzvah to sleep in it (or eat for that matter) to begin with.
And yes, the only sort of discomfort we find are universal; cold, etc. There is a category of istenis, but one cannot claim to be so when it is convenient for him.