TLDR, Yoshi cites 5.0 as being the design choice that fits as many people as possible, not 3.0 or 4.0.

Basically, make it as friendly and accessible for sprouts as possible. This shows in healer design where for mainstream content, it really doesn't matter outside of logs if you go full try hard and min max everything into oGCDs or if you just roll Medica IIs and do the /manderville, resources are plenty and our kit is mighty, either way works just fine until you start progging Savage.