Read about the history of NT and Dave Cutler the designer behind NT. He was a VMS veteran and brought heavy influence from there (https://en.m.wikipedia.org/wiki/Dave_Cutler). He is an amazing engineer. Still working.
I would love to return the question and ask, why the Linux kernel is better.
I haven’t claimed that Linux has a better kernel.
Basing your claim that NT kernel is better than Linux on the employment of a single developer seems pretty pointless. Smart people work on both kernels. Not so much of a feature that is better in one or the other.
Was not my claim that the NT kernel is better ;) They are different. There are only 3 dominant kernels left. Two commercial ones and one free. My opinion is just that the NT and also the macOS kernel are in popular opinion a little bit underestimated because they are very misunderstood.
I would love to return the question and ask, why the Linux kernel is better.