Reminds me of my old dental hygienist who would "threaten" me with a more invasive (and expensive) cleaning process every time I'd visit. Switched dentists, me

Reminds me of my old dental hygienist who would "threaten" me with a more invasive (and expensive) cleaning process every time I'd visit. Switched dentists, mentioned my "gums" and the concerns of my old dentist, and they were like "no, your gums are fine". Also reminds my of my experience with my disease "specialist" and my GP. Specialist is concerned about my cholesterol, puts me on meds, schedules regular (now expensive) blood tests. I mention it to my GP and he's says "your cholesterol is fine, don't worry about it" Who do I trust exactly?