It’s like an old saying. It’s like trying to catch the sunset at 2PM.
depending on what kind of clothes you have to shoot, you must take a decision and if that means to change your schedule you must change it. No art director can tell you in this world that you can’t change it because of some kind of reasons. Ask respect for your job and pretend respect from everybody.
Shooting beachwear or similar with the sun that high and strong is like killing your job since the beginning.
or at least find the right solution.
don’t tell me it’s a matter of budget because it’s a matter of trust and skills.