I don't think it will be hard for Pogacar to win the World Championships. Sure, his national team isn't the strongest, but he doesn't really need them. Stronger teams from other countries will make the race hard without turning it into chaos.
Take Belgium, for example — Wellens and Van Aert aren't racing, so it's basically just Evenepoel as their sole leader. That situation actually works in Pogacar's favor. All he has to do is mark Evenepoel and wait for the right moment to make his own move, while Belgium does the work of keeping others in check.
I wouldn't be surprised if other countries take a similar approach. For Pogacar to lose, several top riders would need to go all-in and attack early — but most riders don’t dare to do that. In the Tour de France, there are multiple stages where breakaways can succeed, so riders take more chances. But the World Championships is just one race — one shot — and that makes people more cautious.