Almost every article I see about young people by MSM dying from Corona features this issues. The title is click-bait to draw you in and make you even more afraid and tacked at the end of the article is the reason they were likely more susceptible. The 51 Year Old man from Ontario, Chronic Leukemia, the young 30-something man who died after leaving Disney had a history of Asthma and Bronchitis, the mother in Washington who survived breast cancer- you're never the same immune wise after cancer.
Even the post about the infant who passed away. Babies can be terribly sick at birth, it's why NICU's exist. Same with young children, it's why there's umpteenth number of children's hospitals. A healthy younger person got sick and died, the family says they were 'healthy' but that doesn't mean they are, you can have underlying conditions and not know it
Like that reddit post of a nurse who diagnosed diabetes in a girl he was hooking up with you can be completely unaware of your co-morbidity. An young healthy athlete died?
that happens on the field all the time. People who're extremely athletic stretch their bodies to the limit and that can be just as hard on their body/organs.
There will be outliers in every group and there will be actual young, healthy, people who die. At this point however there's a whole lot of conflicting information and many media sites are farming fearmongering for clicks.