Solo = danger is a myth.

That's maybe 95% correct, but as wandering daisy pointed out, there are situations where a hiking partner could save your life. The situation of being pinned by a very large, shifting rock can be deadly. If you choose to enter a boulder field, solo, far from a trail, then you might die there. Yet, I take that risk sometimes. I just know that it is a risk and do as much as I can to stay alert.

Entering hypothermia when solo is much more likely to be deadly than if you become hypothermic with an experienced hiking partner with you. That's the plain truth. That is why I take excessive pains to avoid hypothermia when I'm solo. I probably fear it more than any other backcountry killer.

So, it depends on the myth. Some kinds of solo danger are more dangerous than others.