Yes, agreed. My Dad was raised 5th generation Mormon. Born and raised in a suburb of SLC, both his mother and father were devout Mormons. He became a "Jack" or fallen away Mormon, married my Mom, a confessional Lutheran, and we 3 children were raised Lutheran. I also studied the LDS faith and as you stated there are beliefs which are incompatible with historic Christianity, but as you stated, they do help in times of need. Also they help their own. My grandmother, when she was living alone in her older age away from her kids always had a Ward member pick her up for church and other activities,take her grocery shopping, ect. She was no longer driving but never lacked for a ride anywhere. I do know there are other close knit faith communities that do this, as well, but to LDS it's second nature. Also the Word of Wisdom makes sense(but you're going to pry coffee out of my cold, dead, hands, LOL)
What you described is called a Fast offering.