One guy came to my shop and asked me about this. I told him how I do it (drop starting sort of) and he said he severely pulled a back muscle when he started the saw on the ground, which is supposedly (but isn't) safer.
I can easily start my Stihl 066's without compression releases, using my modified drop start method. I don't think I can start them on the ground without risking serious back or shoulder injury. If you are worried about safety put the chain brake on.
The key is to pull the rope with authority, not tentatively. If you don't pull with authority the compression will not be overcome, and that can be painful, especially on a cold day. By the way, I am 60 years old. I hold the handlebar with my left hand, and pull the rope with my right, exerting some downward force on the saw while pulling on the starter rope.