Data and statistics. Please cite the "far more dangerous to younger ages."
According to the CDC, there have been 486 deaths from January 4, 2020 to September 4, 2021 in the 0-18 age group. Total. So, unless there was just one death in that age group in 2020, and 485 in the last month, color me sceptical of your statement. Plus, we're not even vaccinating kids in that age group.
Additionally, if you're talking about 0-50 age group, there are a whole shitpile more people in that age group than the 75+ that covid hit hardest early on. If covid was more dangerous and more transmissible to the 0-50 crowd, shouldn't we be seeing much, much higher death counts with this latest surge? We're not.
data.cdc.gov