If something is “easy to use” this includes the time you need learn said thing.

Drinking rahmen from the bowl is easier then using chopsticks (even if you are more elegant with chopsticks)

Driving automatic is easier then driving manual (even if you may be more efficient with manual if you practised shifting a lot)

Walking is easier then flicflacs (even if you may be faster with flicflacs if you practised a lot)

Using Ubuntu is easier than using arch (even if arch gives you more control and opportunities if you understand it)