The premise here is a bit off. Most resolutions don't fail because the concept is broken - they fail because people design them wrong from the start. You set vague stuff like "hit the gym" with no plan, no accountability, no reason why February matters less than January. That's not the resolution failing; that's you not actually committing to anything concrete.
The psychology of a fresh start is real, but it's not magic and it's not enough on its own. What actually works is specificity and removing friction. Instead of "read more books," you'd say "read 20 minutes every morning with coffee" and actually buy the book beforehand so it's sitting there. Instead of "gym," you'd pick a specific time, specific days, and ideally tell someone about it so you feel dumb bailing week three. The people who stick with resolutions aren't more disciplined - they just built a system that doesn't rely on willpower alone.
So yeah, there's a point. But not because January 1st is magical. The point is forcing yourself to think through what you actually want and how you'll make it happen. Most folks just skip that part and wonder why it didn't work.