You don't have to be a teacher, explain yourself, or much above the FARs, heck you don't even have to be a nice person, all that just helps make you a successful APIA, YMMV.
Should a pilot know all the ADs and SBs, sure, but let's look at this.
I'm a dentist, always loved aviation so I got my PPL and have amassed 150hrs, about 6 months ago I finally bought a plane, let's say a PA28-180, yeah I know enough to pass the oral systems part of a checkride on her, I remember a few ADs from when I got that prebuy done, but end of the day my life revolves around teeth, flying is a passion/hobby not how I make a living.
Time for the annual comes up and I hear about this dude named Tom, I take my trusty PA28 over for a annual and he says "we're doing this", well OK, I guess it needs to get done for the annual, I let Tom do what he says he needs to do.
A few months later I meet Bob, the ATP/CFI career pilot, he was recommend as a CFI for my BFR. As we're working our the ground part of the BFR, he notes he has the exact same airplane! Well now we have to get a little off tangent and talk PA28-180s, I mention my annual and how Tom D said we in no uncertain terms that we WE'RE GOING to do this, it added money but hey it had to be done.
What do you think my impression of Tom is going to be when this ATP/CFI tells him that, no, it didn't NEED to be done, I'll tell you one thing I'd wager that would be the last time Tom touched that PA28, I'd also wager our dentist tells no less than 5-10 other pilots about how Tom tried to trick him into making more work, I'd also wager that ATP/CFI tells a couple folks too.
Now on the flip side, if Tom took a extra 15 minutes and explained his reasoning behind why he thinks it needs to be done, and a quickie refresh on a SBs vs ADs, well as a dentist in Seattle who makes a few coins, he'd probably get a "thanks for looking out and thanks for explaining that to me" now Tom has the same amount of billable hours, probably a customer for life and good press at the field.
So if in 15 minutes you could have a customer for life and good press, OR, a one time customer and substantially more bad press, how do you want to spend that 15 minutes??