Building “higher walls” is a hishtadus implemented in many communities in Klal Yisroel. It’s a hishtadlus that many FFB’s and BT’s put a good deal of their precious trust in to keep their kids on the derech.
But, no hishtadlus, however worthy, can “make” anything happen or guarantee a result. G-d alone made, makes and will make all happenings (Rambam Thirteen Principles of Faith #2). G-d is the One & Only Source of every seemingly independent power, and every seemingly effective hishtadlus (#’s 2 & 3 of the Six Constant Mitzvahs).
If you trust in Hashem while making a histadlus, He will requite and fulfill that trust in Him. Whereas if you repose your trust in anything else—-such as building higher walls—- Hashem’s system is to remove His Divine Providence and let “nature run its course”. The very thing you trusted in will be the “cause” of your frustration, disaster, loss etc and your trust in it will be unrequited.(Heard from Rabbi Avigdor Miller ztl)
There is a lot of emphasis placed on building higher walls but insufficient emphasis on filling the confines of those walls with a meaningful, loving and rewarding relationship with Hashem. Instead the confines of those higher walls continue to be filled with externalities based upon social/cultural conventions that are mistakenly confused with genuine Avodas Hashem.
Is it any wonder then that the hishtadlus/strategy of higher walls is failing regardless of what community is being discussed?