Exercise cueing can make or break your experience.
The form, feel and internal execution of an exercise conveyed to you in a way that lets you embody it for the duration of your performance of it could be what separates you from "just doing it" and moves you more towards pursuing it on a committed basis.
A good exercise professional understands this a clutch part of their job and lives the cues with you. They know that this is not only their most useful means of conveying their value to you, but also you seeing the value of exercise experience in and of itself rather than in the shadows of its outcomes.
It is likely not their passion or commitment to exercise that attracts you to them. That might help at the start. It is more likely their ability to help you embody exercise for yourself that has you place such high value on them.