Well I don’t usually resort to anecdotes to make conclusions but as someone who is also bi, I have met married couples where the man is bi and they have gay children. Most I imagine aren’t out to their children as this lifestyle is not one I find to be easily accepted but I may be wrong. My experience would challenge your statement. Don’t have the data to make a conclusion but would just point out that our experiences do not align so your statement may be true for you and mine true for me.