SMT runs off of two "lanes", floating point and integer. It can absolutely hit 100% when running SMT if the application is written to do so, but most aren't, so in most gaming situations, 50% to 60% is about as high as you'll see during load, which is why I said it. Disabling SMT gives a 1:1 metric on load to potential load.

And that is not very common with CPUs with a high core count to throttle below 100% usage...

My career is literally systems administration. I deploy, monitor, and configure virtual servers that have way more than 12 cores daily. That statement isn't even remotely true. A CPU bottleneck means that the system can no longer push past a certain point of performance or tasks because of a few factors, namely being heat prevention, and the fact that the CPU is already using 100% of the resources available to it so it can't do anymore. And I don't recall saying 30% either but that doesn't fit your narrative so who cares.