iacisrmma…………..
sorry, I was in the kosher catering business (decades ago). The caterer is not in charge. It is the caterer’s job to cater to the wishes and desires of the paying customer. The bride, her family or their paid wedding planner/coordinator goes through a schedule in advance with the caterer and sets time and events. No caterer has any business telling a chosson and kallah what time they MUST make their entrance.
My only take on this is that some people who purchase a ‘Wedding Package’ at a supposedly reduced price are told there are no variations accepted…you are contracting for the package as it exists…you get what you pay for.