Why would you put a laptop on a damp surface? There is a large exhaust vent on the right-hand side, and intake on tge bottom. Its not a problem unless you put it on something like a blanket, then I feel that it needs more ventilation. Source: P14s gen 3 owner.
It’s not on purpose. It’s just that kitchen tables, dining tables, or tables at cafes are common places to use a laptop, and it’s easy to miss seeing a wet spot.
I have an HP EliteBook 845 G8, with bottom vents for taking in air, that is then sent out the back towards the display hinge. It's also one of those uselessly thin laptops with a ridiculously small heatsink. It has a Ryzen 5650U (6-core zen3), no dedicated GPU.
99% of the time I can't hear the fan, even when it's around 25-26 ºC (78 F) in the room and I use it on my bed. The case is warm, especially towards the hinge (where the CPU is) but to uncomfortably so. The palm side, where the battery is, is usually rather cool to the touch. I do have the bios configured to have the fan on at all times when plugged in, so there's no heat build-up that requires a burst of fan speed to evacuate from time to time.
The other 1% it's probably attempting to lift off, but that only happens when compiling for a long time or using webex with video.
One difference with Lenovo and Dell, though I don't know how much it helps, is that the case is metal.
Bios causes regressions in Linux? Fix the bios.
Fingerprint reader doesn't work in Linux? Upstream fingerprint drivers.
Other vendors either remove hardware, and pretend support like Dell, or just don't bother.