Of course, if it is spring, and a coyote has young close by, it might feel forced to defend its young and might indeed act in an apparently aggressive manner. Then, the typical advice becomes self-fulfilling.
I censused coyotes on Ottawa's Dolman Ridge as an NCC volunteer for over a decade pre-Y2K, mostly during winters when tracks made accurate counts possible. Whenever I encountered one, I stood tall, yes, but did not threaten them, in fact the opposite. I looked into their eyes in a relaxed manner, hands by my side, with a non-threatening posture. They always turned away after a moment and trotted into the woods. I never felt in the slightest threatened by a coyote the whole time.
The conservation team of the NCC agrees with this approach.
In truth, given my experiences with northern Cree people, I thought to myself, "The Great Spirit is in both of us. We can live together". I have zero evidence that my actual thought was transmitted to the coyote in any way, but they behaved as if it was. I was never aware of perceiving anything from a coyote other than its body language, and I assume that is all they could perceive from me, but it was enough.
With care and respect we can indeed peacefully coexist with coyotes, and with most other living things. All life is such a miracle!