I've had the Mac Studio since its release. I've never heard any noise coming from it, which sits on my desk just under my display. It's perfectly silent.
I do not doubt that some people have a Mac Studio that is experiencing some issue that's causing the high-pitch noise. But this is not the norm, it's not the majority, it's probably not even 1% of users. And it's probably more about those people's hearing than it is the computer.
I've also read a bunch of users here with Thunderbolt port speed issues with their Mac Studio. This, again, is a problem I'm not seeing, nor is anyone else I know that has a Mac Studio.
For people who wanted extreme power, low cost, and the flexibility that "bringing your own peripherals" offers – the Mac Studio is probably one of the best Macs Apple has offered in years (in my opinion).