Well obviously the licensing issue comes off the table, but for a logo graphic, live font(s) in the file are a potential threat to the integrity of the design, and subsequently the brand image. When graphic files containing live, un-embedded font data travel between computers, the probability of error increases significantly.
Perhaps I already have the font you used in my logo, so I unwittingly fling open the file and take steps toward some form of deployment. Maybe I add an effect, resize the tagline, convert to outlines, and hand it off to a vehicle wrap provider. Later, when my wrapped vehicles come back, for some reason, I suddenly notice for the first time that the logotype isn’t exactly the same as the signage my partner had made a month ago. Then, we recheck the logo design presentation you delivered (and we approved), and neither the signs nor the vehicles look exactly the same as that either?!?
It turns out my partner’s computer had some weird type justification defaults in play when he set up the signage order, so there’s an unsightly gap between 2 characters that wasn’t there in your design. It’s not a huge difference, but it does seem to get bigger every time I look at it. But that’s nothing compared to how bad I (we) screwed up the vehicle wraps. Apparently, I only had a font on my system with the same name as the font you used in our logo. It’s similar enough to pass for the same font, but one of them is clearly another designer’s knock-off of the other.
Why didn’t you just give me a properly designed, locked-down logo graphic that can’t be changed by font substitution?