Some people like to use tools to make something possible/easy. Others like the tools themselves.

The Bambu printers, at the time of their release, were an incredibly superior pieces of hardware and software that was priced very very well and, this was a really big deal, worked fully right out of the box.

It was a pretty clear choice in either dicking around with the tools, or actually using the tool to make things. They caused a huge shift in the industry because it was silly to NOT buy a Bambu, if you wanted to actually make things.

I love open source software, but I also know that a team of focused, dedicated, high skill, engineers, who are financially motivated with big paychecks, to do well, will often do a better job making something proprietary than a bunch of volunteers doing it for fun, on the weekends. Ffs, we didn't get a half ass implementation (thanks to shite 8 bit boards everyone was using) of motion/vibration compensation in all the open source firmwares, a tech from the 1960's, until right before Bambu's release. It's still not available in most. Pressure compensation was still relatively new.

Prusa's printers also worked out of the box. They cost slightly more, and their staff aren't volunteers.