For the vast, vast majority of games it makes no sense. Lives are a holdover from arcade machines that wanted to eat up your quarters. I was glad when Super Mario Odyssey abandoned lives. I get that a lot of the game isn't tough at all, but it's a welcome change.
Lifetime Sales Predictions
PS4: 130 mil (was 100 million) Xbox One: 55 mil (was 50 mil) Switch: 110 million (was 73, then 96 million)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima