“Then why why is this the case? ~”
You tell me. What do you think it means? Does it mean that kids shouldn’t get vaccinated?
I think that 116,362 reported adverse effects that include death from just these 3 vaccinations belies your assertion risks are "so remote". I would suggest that enduring the actual disease with proper care for and reduction of symptoms is actually more beneficial than vaccination. I would suggest that the benefit of life-long immunity conferred by the natural disease is preferable, TO ME, than the still to this day untested risks of the adjutants contained in vaccines. I would suggest that these thousands upon thousands of people who have had adverse effects up to and including death from vaccines might argue that the risk for them was not so small. But that's just me (and a few million others).