Christians say, “God is omnipotent. He is all-powerful. He can literally do anything, including giving people superpowers, etc. God can do ANYTHING. He could make pigs fly with a snap of the fingers; he could create infinite universes with just speaking it into existence.” But, at the same time, these same people say, “God had to send his son to die because it was the only way.”
Okay, then God is not all-powerful then, lol. He’s not omnipotent. That’s literally the opposite of omnipotence. If God is omnipotent, then he literally had infinite options. In fact, if he’s this powerful, then sending his son is a really dumb idea and makes zero sense.
I don’t know if this comparison makes sense, but in The Flash TV show, when they were fighting a speedster named Savitar, there was a building with metahuman power dampeners so you can’t use your powers inside this building. Savitar was going to kill Iris West, so what would be the smart thing to do??? Maybe put Iris in this building because Savitar can’t use his powers inside it. Case closed. It would make no sense for this option to be here but then for Team Flash to say, “We know this easier and smarter option exists, but Iris, you dying is the only way we can stop Savitar and save you.”
See what I mean? Point is, if God is omnipotent, then Jesus dying wasn’t the only way. Jesus being tortured so he could feel all the pain of sin was not necessary. If you’re saying this was the only way, then fine, but don’t say God is all-powerful and limitless, because clearly there are limits to God’s own power.
Non-religious but likes plot analysis.
An important factor here is free will. Without free will, one may easily have a perfect utopia of the kind you think an omnipotent God should be able to achieve. But it would be a meaningless utopia; like a kid playing with toy figurines, just deciding everything we say and do.
God doesn’t want that, and thus self-impose a limit on the omnipotence to not interfere with our free will. We are children that need to be taught, rather than marionetted to “save us” from the negative urges of free will.
Here, the (self-)sacrifice of Jesus enters. It is not about God using Jesus to fulfill some perverse quota of pain and suffering that God has decided is due before we are allowed into heaven. It is more about what humanity must experience for the lesson that makes heaven remotely possible as a concept. Only through pain and suffering will we come to understand how our actions affect the world and those around us. Jesus takes (some of) the pain and suffering “in our place” with the aim that the message will resonate with people throughout the ages to teach us about love and understanding, making the concept of a heaven possible despite our nature as (non-brainwashed) beings of free will.
In reality, even after 2000+ years, we still seem pretty far off the mark. Maybe the lesson didn’t take the way it was intended; free will is a fickle thing. Or maybe God is playing an even longer game.