I'm a big fan of Attia and familiar with his work. That's fair that excess calories is among the major contributors to Healthcare and addressing that would probably be among the largest impact items we ought to tackle.

I wonder though if with the advent of GLP1 drugs, if obesity may already be a solved problem, but merely a matter of time?

I imagine, as with anything, perfect doesn't need to be the enemy of good enough. A huge multifaceted issue like obesity could be addressed from many angles.