I get your point and maybe there’s a better alternative to scrum that keeps the culture and structure intact.

I might be wrong here, but as I see it scrum is fixing problems by changing the team structure itself. If that structure is really the main issue, you can’t not make that structure change, call it scrum when it actually has nothing to do with it, and then blame your inability to adapt on the methodology you’re not using. Because there are teams that are able to adapt and use scrum successfully.