Well, we’re here on a web site discussing it, and the top two recommendations are “build one yourself from parts” and “buy a used one in cash”.
Seems to me that it’s the very definition of unrealistic if the real world has almost no examples that do it.
I agree with you. There’s nothing wrong with not knowing how to do something. We all start basically every endeavor not knowing how to do it. My complaint is specifically with people who march into that thing they haven’t learned yet with an attitude of “and you’re all wrong and stupid for not fixing it for me”.