Have you seen how big a professional camera actually is? There are basic physics reasons why they need to be so big. They are complex machines backed by a team of experts.
https://petapixel.com/2019/12/03/this-video-explains-why-tv-...
A film/tv studio is a factory and, just like a steel mill, what it does cannot be replicated in the home. What we are all watching from these in-home shoots is sub-par footage more akin to 1980s soap operas than modern studio footage.
Watch the various Linux Tech Tips episodes about their storage woes. When you film/edit on 4 or 8k raw footage, just editing together a simple youtube segment requires racks of servers, another thing not practical in homes.