Most people also understand that, because they're not "frequent" users of a thing, they absolutely suck at using it, and set their expectations accordingly. In particular, they realize that doing anything non-trivial with the thing requires them to spend some learning and practice time, or asking/hiring a "frequent" user to do it for them.

So the reasonable response to being told you're holding your scissors wrong is to realize that yes, you most likely are holding your scissors wrong[0], and ask the other person for advice (or just to do the thing), or look up a YouTube video and learn, or sign up to a class, or such.

Expecting mastery in 30 seconds is not a reasonable attitude, but it's unfortunately the lie that software industry tried to sell to people for the past 15 years or so.

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[0] - There's much more to it than one would think.