Earlier quoted context omitted.
As an employer, I don't expect every potential employee to list all of their previous roles. Especially for more senior people, I expect that a resume is tailored to show me their best relevant experience. Leaving out a short stint somewhere wouldn't worry me.
I agree with your comment, I was just reacting to the recommendation to lie and just say that you took some time off. As a hiring manager, I would not care at all about a non-comprehensive list, but I would absolutely care about someone trying to hide past employment
For example - during the 2008 downturn, I worked a job that was not terrible, but used tools and hard skills that were completely non-transferrable to any job I've had since then. So I no longer put it on my resume even though I was there for 2 years. Would that two year gap over a decade ago be a conversation? Assuming of course, that I even put anything prior to 2010 on an application anymore.
I guess for me - do you dig into every gap you see? Maybe they left under good circumstances and just don't want to list the job because they weren't proud of the work they did there.