Only a "problem" if they don't both start. But that's a different discussion.
I don't think that their level can get constantly much higher. Vingegaard should do better this year, if his preparation is not hindered in a severe way. Whether Pogačar can repeat or even better last years form, remains to be seen. Especially with a strong team performance, Visma might again be able to bring a real fight. I sure hope so, albeit I don't think 2024 TdF was especially disappointing. With the question mark above his form, Vingegaards win created (at least for me) some suspense until it became apparent that he can't challenge his rival.