Isn’t casting lots pretty much the same thing as lets say tossing some dice
That depends on the context. If you’re in a casino, yes.
But, in a religious context, its more like praying for a sign to know God’s will. Like:
Judges 6:37 I will put a sheepskin on the threshing floor. If there is dew only on the sheepskin, while all the ground is dry, I will know that you will use me to save Israel, as you said.”
I believe tarot cards are based on black magic which is calling on evil spirits. So, they are forbidden.
If so, why was it ok for the apostles to do this like when they replaced Judas with Matthias in Acts ch 1, and not for us to do?
It was a request for a sign of God’s will.
Also, when and why did we stop replacing the 12 apostles.
Never.
1461 Since Christ entrusted to his apostles the ministry of reconciliation,
bishops who are their successors, and priests, the bishops’ collaborators, continue to exercise this ministry. Indeed bishops and priests, by virtue of the sacrament of Holy Orders, have the power to forgive all sins “in the name of the Father, and of the Son, and of the Holy Spirit.”
Was there a specific reason.
Not sure how to explain. The Apostles appointed their successors wherever they went. And those people appointed Apostles wherever they went. The goal was to evangelize the world.
The mormon church has their own 12 apostles why shouldn’t Christ’s true church still have 12 apostles?
Why should they? Is there some rule that there must always be 12 Apostles and only 12 Apostles?