Seems pretty spot on and it has been this way for years. Even in 2020 when I bought my first printer, Prusa was charging $1,000 for a printer that everyone else was selling for $300-$400. They only maintained through that due to good will from the community and the rest of the market outside of Creality being little cottage-type businesses that weren't selling high volume.

Even now in addition to the closed-source boards, they have a closed-source cloud-based smartphone app

Here's a 2 year old post on reddit bringing up the same concerns:

https://www.reddit.com/r/prusa3d/comments/10g6fgv/prusa_giving_up_on_its_open_source_roots/