tbh it seems intentional to me, and I broadly prefer it. I would much rather have a hot device than a loud fan, at very nearly all times I use a computer. hot aluminum dissipates heat quite well, just passively cool as long as possible please.
could they have used larger fans to reduce that noise? yes, definitely, and probably should have. but it's hard to beat using the whole device as a radiator.
Personally I would prefer a laptop which optimizes for heat and noise over one which optimizes for thinness as a measure of success
you've got quite a lot of alternates then, just not any macs :)