I disagree, and to speak so broadly as to say it's not a usability problem regardless of context or audience is irresponsible at best. You designed an interact

I disagree, and to speak so broadly as to say it's not a usability problem regardless of context or audience is irresponsible at best. You designed an interaction that requires the user to press a button. Take an additional 30 seconds to describe on its label what the effect of pressing that button is.