“Those things, the important ones, are beyond my control.”
They are in your control to investigate and ask about prior to sending your son.
“Chilling”? Ben Yehuda? They’re going to go there anyway.”
Wouldnt it be nice to know that the Yeshiva took notice of where they went, who they went with, when they went, how often they went and what they did while they were there? It is something you can inquire about before sending your son. you are concerned about the 3 weeks of bein hazmanim. If you dont look into the really important things, the entire year could end up as one long bein hazmanim.