if you wade in and throw punches without countering then yeah, you get flash KO'd more often than others. If you've learned better than that then it happens far less -- like 1 in 30 instead of 1 in 10. you don't know who, if anyone on this forum, quits so why be a duechbag and outright accuse them of doing so -- especially since you care so little about their record or score as you claim?
clearly you care. i can sympathise because when the game launched i was getting flash ko'd at about 1/10 and thought the same about people with mint records but once i went through career and learned the game a little better i dropped to the 1/30-40 range for flash KOs. Nevertheless, quitters get losses on their records now so this argument is stupid.
Keep your hands up, wade in and out of the pocket, don't worry about being the first to dive in with a strike, don't button mash, and watch your stamina. If you are relying on flash KOs for wins you are going to get KOd more often.