It's because of the man-made doctrines attached to the word. Some misunderstanding and some taught by wolves preaching extreme strawmen (like babies will go to hell..there are preachers in the world who teach this false doctrine and claim to be reformed or Calvinist but are just false minister of self righteousness)
See how stupid that sounds.
Its seems more logical and in balance with the nature of God to allow free will. The free will acting in cohesion with the inner soul that in many ways is connected to its creator. Like a infant in search for their mother. Like artwork is forever connected to its artist. We are drawn by God and connected to God. Everyone. Not a few elect.
God predestined a means of final atonement of sins for all who would only believe. All names begin in the book of life. The only scripture we have speaking on the book of life mentions names being taken from the book of life. The elect will be those whos names have remained or been foreseen written in the book of life.
Its like saying in battle 2 bullets are pre elected one to kill and one to miss the target. 2 soldiers in battle come pre elected to face these 2 bullets. One soldier dies and the other is safe. If God pre elects salvation then we are without free will and then that makes God also in complete control of his creations death. Now we know God gives life and takes life, but at the same time we know the fallen nature of the world, free will, evil and disease also takes life sooner than Gods planned number of days. Just as God gave us all a number of days to live but by our choices and choices of others can limit those days. If God didnt allow free will then we would have to believe God makes children get sick with cancer or people to starve to death.
It all comes down to God had a plan predestined to save mankind. The gift is there for all who have faith in the one who made this gift a possibility. To try and describe Gods full interaction and self limited interaction on certain aspects with man is like trying to describe the unknown.