I recall two doctor visits as a kid, one for a very badly lacerated left index finger and one for a metal particle embedded in my cornea. Both were in high school.
I never had a check-up or anything like that until I was grown up. We never had any kind of medical insurance. We were raised by a very hard working single mother, God Bless her, she really did the best she could for myself and my two brothers. I guess it was just a different time, you went to the doctor if you really needed one, not for checkups. We all turned out fine and never did any crime or jail. I was born mid 50s, times were different then.