Yes it matters.
No, there is no point.
I believe that religion matters because the majority of followers of a religion aren't seeking revenge against others, but are looking for a sense of peace and hope. Religion provides that peace and hope that those individuals might not be able to find elsewhere. It still matters because those who do "good" are more likely to continue to be "good". While someone who was considered "bad" may be able to find a sense of salvation and turn to be a better person.
Of course, religion matters to many people, even at this day and age. Why? Various reasons, one example being a Catholic myself; when in need, I feel reassured that God is there to help me, when a loved one dies, I feel reassured that they will be waiting for me in Heaven. I'm not even the largest example, people travel across the world to pilgrimage in holy places and some (though I do not agree) fight for their religion, because it matters that much to them. (again, fully against killing people for having a different religion)
With cause comes consequence (yin yang)
Religion is a construct of humans with or without it we would still act the same, all we would have to do is interpret a religion in a certain way and you can do practically anything. Just look at history countless individuals of were part of religion yet that didnt stop them from committing horrible crimes.
For the most part its just having an authoritarian figure whether king, gods, police or otherwise these are likely the main thing that stops people but we definitely don't need gods or goddesses to be good we invent our own morality and it tends to come back to the whole do unto others as you would like to be done unto whether made canon by religion or not.
people use religion as a scapegoat to indorse conflict when in reality people want what they haven't earned, and for those of you who only do good for the fear of punishment. your no better than the people that do bad all on there own.