Modern notions of hell owe more to Milton and Dante than to scripture. The few scriptural references translated "hell" in English conflate several meanings in the Greek and later interpretations blew that up into the elaborate nightmare hellthreat pushed by authoritarian Christians over the centuries. Such notions are as fantastical as the ones about heaven. There is no reason to think any sort of afterlife OR monotheistic deity to be remotely likely, so it's all down to what fever dreams one wishes to subscribe to.

Sounds like you're pretty confident that some better form of afterlife is possible. Personally I think composting is our best opportunity for life after death.

It also needs to be considered that it was relevant to the political situation in Florence at the time