From a Doylist standpoint, sure. But if you want a Watsonian lore justification as to why people still have visible scars, loss of function, aging, and other mortal frailties in a world where, as you said, magic can raise islands then that would be a reason for it. I mean magic could theoretically do everything and remove all stakes from the equation entirely - and that would make for a shit story with zero drama and thus zero interest. It's ultimately self-defeating.