Disciplined professionals self organise. No ideology is ever discussed even if they use it.
The difference is focus. And that’s crazy important.
I’ve been at this for 20 years and watched both successful and unsuccessful teams. The most successful team are not ideologically or process driven. And quality, time to market and technical debt is orders of magnitude lower than any externally applied agile class process which is purely focused on delivery and compartmentalisation.
You know what is disciplined? Formalizing a process and following it, even when it's inconvenient or annoying. Getting by on talent, high bandwidth communication, and sufficiently small scope might work, but don't call it "discipline". It's luck and narrowly defined circumstance.
Try using that method on a $50M enterprise project with 100+ developers and see how far you get before you choke to death.
Cowboy coding isn't agile.