Policies are in place for a reason.. While in this instance an FA or gate agent certainly could've probably taped up the bin and departed sooner, making exceptions for certain "non-essential" repairs could easily lead to safety issues on items that are more serious if shortcuts are taken. It may seem ridiculous, but I'd much rather wait a bit for knowledgeable, certified team members to ensure all is good to go, than have someone assume and run into a dangerous situation later.. Unlikely for a closed bin, but too easy to let smaller issues snowball into larger issues that are "okay to just handle with what you have on hand and go" that lead to a major safety issue if you let things get loose.