When people argue passionately on both sides of something, it usually means it doesn't matter much. You can succeed with or without a plan B, with or without a morning routine. Most debates are just personal preference.
When I see many people really aggressively arguing on both sides of something, to me it means the thing doesn't matter. Should you have a plan B? Should you not have a plan B? Well, if people have succeeded with a plan B and without a plan B, then it probably just doesn't matter. If people have succeeded with a morning routine, without a morning routine, then morning routines probably don't matter. There's just so few actual variables that contribute to the outcome that most of these just boil down to like, you do not live according to my preferences. Okay, that's why you have your life and I have mine.