The days of Democrats protecting the little guy are long gone. Mormon kids who adopt a leftist political ideology very likely will leave the church or become an annoying leftist Mormon who tries to poz up the church because that’s just the way these things go.
When I was in student government in college I knew a Mormon gal who fell in love with a person who was left wing. She began to adopt his political agenda. Last I heard she left him and ran off with a woman. I have also known left-wing people who, for one reason or another, took the missionary lessons and joined the Church. It was amazing to see the transformation from left to far right in all these cases.
If in doubt that our Church leaders are ignoring a very vital portion of the spiritual wall protecting the young members ask the average young Mormon at age 13-14 (where values on family and goals in life are usually established in a more concrete way) what the LDS position on abortion is. Then ask how they feel personally about gay marriage. Oh sure, they know the LDS position on porn (and they generally ignore it) but they have no clue in regards to family issues. Guess what happens when they later are confronted by people negative to the Church.