Well when you have broadway and the nut flush draw, you don't want to scare everyone out, you want to get their money in the pot, so the hand played out exactly has you would want it too.
Sure suckouts happen but you don't want to play scared and force out worse hands because they might draw out on you. You want to value bet, not push everyone out when you are that strong. If you are playing that way consistantly then you are missing alot of opportunities for the odds
to work in you favor. Suckouts happens don't let it make you play bad poker.