Quick Question - Changing fluid with Gemini drives

My dealer told me that they do not recommend I change my fluid and filters on my own, that the resulting "dry start" and air in the system can quickly destroy a hydro. And that there is a special procedure that must be done.

I could see it being total hogwash but also some truth in it. Dealer was very open and helpful on other things so I don't lean towards it being a fib but wanted to see what you guys thought.