Yes...I'd think that without the overlay of religious based "directed moralities" that conflict with one another, we 'should' eventually do better than we do now...if we survived the transition!
It's not like giving up cigarettes or becoming a tee-totaler, where physical cravings we believe are bad for us can be sublimated or controlled...people believe that religion is GOOD for them, and arguments to the contrary fall on deaf ears, because there is no way to prove a negative. "There is no Supreme Intelligence!" "Why? Just because YOU can't see/feel/intuit it? I see him/it every day, and you can't explain how this universe came to be any other way!".....and I really can't...and it's hard to explain that I don't NEED to explain it: that the search itself is enough.

See?...it's a very, very complicated argument to show why religious beliefs might not be right or justified, and many, many atheists do not actually think it through, but are just expressing their own emotional reactions to some bad experience in church, loss of loved ones, or pessimism about life in general. It can be worse to be right for the wrong reasons, than to be wrong for good reasons!

Religion does serve many useful purposes in this world...at this point in our development as humans. It would be nice if more of its adherents would be more tolerant of each other and not use their beliefs so negatively, but I see no way to take the basic beliefs away from them without profound & serious consequences. It will take much time and MUCH education beyond what we can offer right now to wean good people from their ultimate security blankets....and, who knows...a voice from the sky might come booming down one day and prove them right!