This is super valuable advice. One of the biggest issues I've seen in the technology world is forgetting that we are (often) not the target customer or the largest moneymakers.
There's a kind of minimum barrier of entry to interact on the places we like to hang out (knowledge, interests, etc), so a lot of people tend to get used to everyone being at that level of intelligence/tech savvyness. Then you launch a product that any "tech" person would easily be able to navigate and use, but someone who still mixes up which one is the mouse sometimes might still have some problems with it.
There's a kind of minimum barrier of entry to interact on the places we like to hang out (knowledge, interests, etc), so a lot of people tend to get used to everyone being at that level of intelligence/tech savvyness. Then you launch a product that any "tech" person would easily be able to navigate and use, but someone who still mixes up which one is the mouse sometimes might still have some problems with it.