Until some one grows a functioning third arm or leg, every structure has a weakness.
Part of what Jiu-Jitsu is, is figuring out where energy leaks are in a given system.
Stating this after reading ad copy yesterday along the lines of the only Guard you’ll ever need. lol
On a related note, even wonderful well thought out positions are garbage if telegraphed and/or predictable.
Seek less answers and more general awareness.