When you don't share something, you are hiding it. When it is spiritual in nature, that is occultism. "Occult" means "hidden". Hidden spiritual knowledge is occultism.
Occultism is the hallmark of pagan and "mystery" religions. Mormonism fits into this category because they have the belief (as you yourself just asserted you have) that certain knowledge is not to be shared but rather to be hidden. This is similar to the pagan religions like masonry and witchcraft religions; the belief is that certain spiritual knowledge must be hidden from people who are "profane", which means they are not worthy to know that knowledge. Interestingly, that is exactly what mormons will say, that one must be "worthy" (i.e. not profane) to have certain spiritual knowledge revealed to them.
Christianity is not an occult religion. Christianity is an open religion, open to absolutely all people. Every Christian Church and Cathedral is open to all - nobody checks who you are when you enter. You can just go into any of them. All Christian rituals and sacraments are done openly for all to come and witness. Baptism, Marriage, Communion, Confirmation, etc. etc. - all done in the open. The message of the Bible - the Gospel - is the opposite of hiding things, it is to promote and evangelize all things of God.
You can come to NY City, a few blocks from where I work, go into St. Patrick's Cathedral any day, walk all around to all the shrines, walk behind the altar, into the chapels, etc. They have mass every day and you can see it. They do baptisms and other sacraments and tourists mill about as they do it. All is open. All is there for people to be able to see so that they can learn about God and the Gospel. We want people to come to our churches for whatever reason because it all points to God. We believe ALL people are worthy to hear the Gospel and all spiritual knowledge from God's Word because it all supports the Gospel.
Contrast Christian Churches like St. Patrick's to the Salt Lake City Temple - if I go visit Salt Lake City, I can see it from the outside but I am shut out and not allowed in. I am considered by the mormon religion to be profane, not worthy. They consider some 80-90% of their own members to be profane. They exclude their own members and all people from all other religions from their weddings, baptisms, etc. You won't see that at a Christian ritual. At a Christian wedding, guests can be other denominations, other religions like mormon, hindu, buddhist, muslim, jewish, etc. Nothing is hidden by Christians.
If the "handshake test" were real in any way and were godly then all mormons should want to share all their experiences. It's convenient when mormons don't want to share that it falls into their category of "sacred" and then they can't or won't talk about it. This is never the case in Christianity.
