The quote came from a CFI in the mid 80's. Think he was trying to get across that millions do/have used single engined aircraft and have faith in them.
If the quote to which you're referring is the statement you made earlier, "
If a PIC of a twin had an engine failure taxying to take off, he would not take off. Yet millions take off with a single engine, single generator.....," being in mind that it didn't make any sense when it was first put out there, and makes no more sense today. It's an idiotic statement. Again, whether you're snaking someone else's comment or saying it yourself, the notion that you'd think of comparing taking off in a twin with one engine failed to taking off in a single engine airplane with fully functioning engine and generator, is idiotic at best.
Have you ever flown a multi-engine airplane?
This really does nothing to instill faith in the single, you see.
Such a statement says nothing about the safety of a single, but says poor things about the speaker.