If you need gear simply ask the group prior to the Flashpoint if they wouldn't mind killing some of the bosses so they can get gear. 99.9% of groups have no problems doing so.
That is exactly what I have asked every flashpoint while I was investigating this, and my conclusion is not 99,9% as you write. It is more like 5-10 % of the groups that agrees to do anything else then a "speed run".
Some are severe allergic to kill ONE mob except the outmost necessary and end up either leaving, starting a drama or ignoring me for asking.
If I only read your reply on the forum I might have believed you but I have done some research about this and my conclusion is that I do not agree with you