We aren't catching up to them because they don't have good drugs, we are catching up to them because each levels take more time than the last. It's an illusion. In outer sect was where we constantly had a lot of insane drugs falling in our laps, too, and they kept up just fine.
We also have WoG that they are going to have access to much better resources in inner sect than outer sect, including rare drugs. We are not going to 'catch up to them' easily here, especially as their specific advantages will be hard to beat (E.G, every single one of their arts being as good as FVM/SCS, access to coherent and synergistic style, etc).
We are three month behind Meizhen in spiritual cultivation, while we were 5 6 month behind in the outer sect (we are still that far behind for physical cultivation I believe).
Now their access to coherent style and better arts are pretty significang boost to their power levels, but it's also irrellevant to the discussion at stake as a coherent suite can only help so much when by green 4 ine can make arts that fit far better than any others.