Listen, you fuck any knot up and it will not work, right?
Figure 8's have advantages and disadvantages, bowlines properly dressed have advantages and disadvantages...this is like arguing ford vs. chevy and then not changing the oil for 200k miles...both will die on you, duh!
Personally, i'd rather tie in w/ a double bowline w/ a rethread...been doing it for 18 years now, averaging climbing (w/ lots of falling ) three days a week...haven't had it come undone under some big falls and am willing to bet you'll break the rope before the knot yields...
Dumb discussion...