For myself, this comparison of Cheetah3D and Blender is not fair as they are not intended for the same market.
What is the target group of blender? Answer: Everyone interested in 3d. Cheetah users belong to the target group.
but its hardware and software is just not up to the mainsteam (PC) world
It was and it is. First time around I got interested in Macs was simple because of software working many times faster while my pc had the much better specs. The difference isn't probably that big anymore, but hardware and software on macs are mor than a match. It's the price that lets many people shy away form the Mac, because you can get cheap PCs that do their work for much less then the cheapest mac mini. But if you get roughly the same performance (like a 5k screen on an iMac), the price is roughly the same.
For 3d works, thoughs, there is the problem of not getting nvidia cards on the mac anymore (which is a shame. Their denoiser is far better than anything amd has to offer), no threadrippers, no this nor that.
Another downside are computer games. Apple lost that customer segment a long time ago and never did enough to win it back. They will certainly not be able to with something like a mac pro.
Dr Wengenmayer and friends wrote it specifically for the Mac.
No friends there. Martin did the programming alone, using some libraries and other prefabricated stuff (as do all developers), but it's his work alone (the friends come in helpful at the marketing side).