The problem is that now it just extremely risky
Most of the upper class has the USD denominated savings effectively kidnapped by their bank institution. Those funds are frozen or very highly capped (only say $200 $USD draw per week). No one can take them out in large chunks. It is extremely difficult to make payroll for staff (many companies paid payroll in USD instead of lira before the crisis).
You can use USD deposits to buy assets or cancel debt though. As long as the receiver / beneficiary of your money another lebanese bank. So, you can pay your debts, or transfer your money to someone else in lebanon. But you can't take physical dollars out for the same purpose.
There is also the concept of "fresh money" by which the bank will let you take out any money that you have recently received from abroad. That's what is making everyday living bearable for a lot of lebanese
This article doesn't go into where that comes from, but it's not unusual for criminal gangs to launder money this way. The agent themselves might not be a criminal, but they take often use the cash supplies from one and transfer back the value somewhere else (via a legitimate business) less a commission.
Whether they should have censored transactions in that instance is irrelevant. The fact remains that the coin does not belong to it's holders.