Oh I'm fully aware people do do this all the time and it happens to pretty much anyone with any kind of job. I'm wondering why people believe their relatives would be willing to do a favor in the first place purely based on relation and even sometimes with the assumption they wouldn't mind doing it at a discounted rate because of that. I'm sure anyone who's spent enough time with family talking about what they do have encountered that before.

Can you imagine asking for help from someone invited over for dinner who's occupation turned out to be plumbing?

"Oh, you're a plumber? Say, just the other day I dumped this leviathan that almost shattered my shitter, and clogged it good, too. Nobody's dared use it since. Would you mind grabbing that bull by the horns after dessert?"