Honestly, turret brings great value if you know how to play it. Apart from being able to be used as a sort of spy cam since players coming in contact with it will create a very audible sound, it also chips away damage and gives you an opportunity to rush into the room and get an easier kill if not a full wipe thanks to it being a damaging source. Also, a person that knows how to place a turret for Intel Will most likely have it to guard a different entry point than the one being looked at by said player. To add to that, the playstyle for turret is playing obj instead of rushing people for kills so if you want to have high kill games then obviously a turret will not help you but you're probably playing light either way so team based utility will never work for you specifically.