My friend recently purchased a MacBook Air with M1. There's no fan at all. It's incredible. It's a block of metal that just works.
The M1 Macs are the first and lowest-end Apple Silicon Macs we'll see. There's a reason they only replaced the cheapest devices with them so far - wait until we're done with the 2 year transition period and I doubt you'll have anything to complain about.
(Sometimes a desktop is not practical, like on a remote photo assignment, but there is a power outlet.)
Because there's a upper limit on how much power (voltage, clock rate, etc) you can shove though a CPU before it starts malfunctioning or getting damaged by purely electrical effects, no matter how effectively it's cooled?
It's entirely possible Apple has set the nominal limits fraudulently low for business reasons, but there are actual physical limits here, and depending on how the CPU is designed/optimized, it's quite possible that it's easy to build a cooling system that significantly exceeds what those limits allow to be demanded of it in a significant range of cases.