have you ever had to split wood?

Ive split wood by hand my entire life to use for heat. Have you?

A practiced arm with an axe beats a maul any day of the week. That's why splitting mauls are a modern device and splitting axes have existed since forever. Plenty of information on it online and on youtube, and why there are dozens of expensive specialty handmade splitting axes to buy and just cheap mauls for the rest.

Also this post is the physics behind it. Kinetic energy scales faster with speed than mass.

Splitting mauls are for people who either lack any experience or physically can't swing an axe that well. An axe is for people who got shit to do and don't have time to waste.