Can anyone help me find the name of this fallacy (if it has one, or is even considered a fallacy?)

It's when someone claims that a certain (realized) outcome is very unlikely by assuming that a near-infinite amount of other outcomes were possible and/or equally likely.

I see people making this very often, and I wish I knew how to call them on it more concisely. Here are some examples:

"It's really improbable for the current time to intersect with my life span, so reincarnation might be true"

"It's really improbable for the earth to be perfectly suited to life, therefore God did it"

Basically, when there has to be an outcome, the fact that there are tons of theoretically possible ones does not mean that whatever outcome does occur was really improbable or significant in any way - something HAD to happen. It's like rolling a googol-sided die and then claiming that God made it land on whatever arbitrary number it ends up on because it's so unlikely.