I’m not 100% sure that pertains in this case. It sounds as if the player didn’t “refuse“ the time out. They just didn’t hear it…
With few exceptions, a good coach shouldn’t “tell you what to do”. They’re going to ask what you‘re thinking, and then offer positive encouragement and/or alternatives.
It’s also worth mentioning that players who are lower rated due to an “inconsistent stroke“ sometimes fail to realize how much that inconsistent stroke may lower the odds of making a particular shot. They know that they’re capable of making the shot, but might overestimate their likelihood of doing so.
Again, a good coach should simply be offering alternatives, and maybe some insight to the odds of success…