Earlier quoted context omitted.
If you have more than one employer listed on your resume, what's stopping you from quitting the company that might hire you? No one wants to hire someone who will leave after some time for a new job.
It's not a good analogy the way you put it, because having more than one employer in and of itself is so very common that it's hard to be biased against it. However a dinstinctly high frequency of changing jobs, say in the 90th percentile among candidates (and how many people take sabbaticals?), now that could be a red flag already. And for exactly that reason - it implies the candidate is relatively likely to jump t…
Your parent compared one (1) gap year in a resume being a red flag for the explicit reason that they might leave again, to someone else having switched employers atleast once, for the exact same reason given by GP.
It's a totally apt analogy. Leaving is leaving.
Your further reasoning doesn't change this analogy. Many employment changes in a resume is no different to many gap years, in regards to the initially stated premise.