PLEASE don't even suggest using opamps as comparators to newbies, or they might actually think it is okay and you know full well that it is not okay.
I think it's an important aspect to realise, so that's why I mentioned it. I did say they made bad comparators. They are actually ok for some circumstances. I used one in my uCurrent test jigs for example. So I really don't see the problem mentioning it, as you may very well see then used as crude comparators in circuits. So I think failing to mention it is actually worse than mentioning it.
If you disagree of course, that's fine, but that's not the way I see it.
Second, you might want to emphasize that opamp input currents can be very very low but there is no such thing as ZERO. Conversely, there is no such thing as infinite. Just wait until your subscribers find out that their photodetector transimpedance amplifier has unacceptable offset or noise or some other problem because they did not consider the perfect opamp with those zero Ibias currents. I still spend countless hours sifting through hundreds of opamp data sheets looking for some unobtainable spec my client thinks he wants (referred to as the component merry go round-- as you call it)
I mentioned we were dealing with an ideal opamp, and that in practice it's not zero, and I have done other videos in input bias currents, and said I might do another video on the practical limitations.
I can't have everything
in one video.
Thinking of opamps as ideal opamps for the purposes of teaching is a very common and well accepted way to do it.
Do you start out by teaching that resistors are noise devices?