Things like the nearly required cloud integration were glossed over with "that's normal today and you get so many shiny features with it" and hardly anyone challenged Bambu by saying that most of the features enabled by cloud integration didn't really need the cloud to be implemented. Things like immature firmware were glossed over with comments like "there are some bugs but that can be fixed over time, so just go ahead and assume that this young company without a proven track record will provide good support to these printers."
Add the marketing to the consideration that there were no other pre-built "fast" printers when the Bambu printers hit the market. Your only other option was to build your own like a Voron, which many people didn't want to do. Now there are other pre-built options that don't require cloud integration, so people can really weigh the pros/cons of the other options, but Bambu got an advantage by being first to market.