If people can only ever get into the goldilocks 'not too strict, not too loose zone' 1% of the time, then it the process is by default not fit for purpose in almost any circumstance.
Likely the 1% of the time it works is the rare case that you have a small and exceptional team working together, in which case the project management methodology is unlikely the reason they are working well.
You don't have to, just find what works for your team and use it. It may not be perfect or exactly how it is supposed to be but if it works then use it.
Likely the 1% of the time it works is the rare case that you have a small and exceptional team working together, in which case the project management methodology is unlikely the reason they are working well.