I totally hear you about being dealt with in such manner. dealers are frustrating, i've been treated like a complete moron in the past and one time i was telling the service tech the specs and who built the part they were replacing under warranty and he wanted to argue with me. i suppose that is why you and i prefer to just do the work ourselves so we know it is done right and don't have to have idiot conversations with ourselves to get it done right. we do however have swearing conversations with parts while working on them.. LOLI know that the fluids discussions are extensive and interminable, and everyone wants us to do it their way.
What I didn't know (until you just told me) were the details of the conversation you had. I hate being dealt with in a patronizing manner. Perhaps you encountered the unicorn of dealer service departments. 🦄
Ted just so you know i hope that i wasn't the "patronizing" manner you are referring too, believe me it isn't my intention. but it is often how dealerships treat people, which i don't like either.