The consequence of being a point light source is that lenses can refocus the beam, parallel or not, back into a point. Doing so concentrates a lot of energy on a tiny surface. And if that surface is your retina, then that when it becomes dangerous, literally burning a tiny hole into it.

It can never happen with, say, a regular light bulb, or even the sun. It the light source is spread out, the image on your retina, or anywhere else, will be spread out, limiting the energy density. This is an indirect consequence of the second law of thermodynamics called the conservation of etendue.