Dentist and dental technicians have been telling me all of my adult life that if I don't floss more I'm going to lose all my teeth. One dental tech in the Air Force told me that I could lose all my teeth in "a matter of weeks" if I didn't start flossing better. Well here it is 50 years later and I still have them all. A year or two back my hygenist tried to talk me into coming in three times a year for cleaning instead of two so I wouldn't lose my teeth. I told her "I'm 70 years old, realistically I don't really need them to last me all that much longer".
They told me the same thing about losing my teeth 20 years ago when this deep scale cleaning became a thing. I even had one hygenist tell me in a very serious tone "that if I were her brother, she would do everything she could to get me to do the deep cleaning, it's that important". 20 years later, not only do I have all my teeth, but I haven't even had a cavity. Even if down the road I do end up losing my teeth, I am pretty confident in thinking that passing on the deep scale cleaning played little to no role in that.