Not these one-hit kills

I’ve accidentally veered into a genuine gripe here, but what the hell is with all these one-hit kills?! From the opening moments you’ll find Link goes from spry to dead from a single arrow hit, but this only becomes more egregious once you’ve got a screen full of hearts, armor up the wazoo, and still a tap on the shoulder from a Lizalfos sees you brutally slain. Why?!