What kind of thinking is this?

1) My Uncle died of lung cancer at 52.

2) My Grandpa died of heart disease at 76.

3) My Sister had a serious case of asthma and died at 42.

4) My other Uncle died of a heart attack at 90.

5) My Aunt had a heart attack at 92; but she was a smoker so smoking causes heart attacks.

6) My other Aunt died of lung cancer at 55; but she was a smoker so smoking causes lung cancer.

The first 4 were never smokers or around smokers.