Ok, I think I understand better now. We typically turn on the feature for internal users first and then do a gradual rollout using feature flags so it's not as high stakes and can be rolled back easily in case of problems.
Yes, feature flags are technical debt and need to be removed after rollout is complete. But undeployed code is debt, too, and the ability to do gradual rollouts or pull features back in case of issues makes feature flags worth it, in my opinion.
