You actually have two different options aside from cloud - completely offline with SD-Card (which is what you get in ... almost all the other 3d printers?) and partially offline (I.e. via LAN) where you upload the g-code locally without passing it to the cloud.
Look, I'm not trying to be a shill for BambuLab, but it just feels like people are making their opinion based on what they read at a glance without actually getting into details or even being able to confirm it themselves.
Personally I believe they just enable less technical folks to actually make use of their printers and not be totally confused at variety different methods and learning about all the Linux stuff just to be able to get something basic as making it possible to see the print without standing next to it. I totally understand why The Cloud is perceived as an evil, but I think there is false dichotomy here where it's either everything or nothing. Looking at Bambu's team actions I truly believe they are at least _trying_ to provide to different kind of audiences (i.e. their LAN feature)