Say in your example that you are gliding down for a forced landing at 300 feet you decide there are unseen hazards on the landing strip you have selected.
You pull the chute and fall the 300 feet with the chute not fully deployed! You kill yourself while a collision under control you would have survived.
I agree pulling the chute at 300ft could be a very bad thing, much better to have done it 1000ft +
Also that really is the point of the discussion at 300ft you suddenly see the unseen hazards and it is all to late. Who is to say you would survive the unseen hazards?
I am frankly amazed at the blind faith in the chute to save all situations and blind reluctance to discuss without feeling affronted.
Me affronted, how very dare you ???