I know a couple, they love their Sony AF, and frame rate, and truly silent silent shooting.
All cameras nowadays are way more capable than the people using them and certainly more capable than the vast majority of internet pundits, forum dwellers and pontificators. A pro photographer can use a 70D and run rings around a keen amateur with a 1DX/5D MkIV/Sony A9, it is very rarely about features, they all vastly surpass the features of pro cameras from years ago, it is about understanding your sport or subjects, about knowing your timing, preparation, practice, understanding of light, composition and consistency, blah blah blah.....
Stop arguing incessantly about the small differences between different cameras or manufacturers, or accept what you are doing is an entirely different thing from owning camera gear for the object of taking pictures.