That is, if you talk to successful founders, they will generally wish they raised less money (due to dilution).
And, if you talk to failed founders, they will generally wish they raised more money (to increase likelihood of true PMF).
Also, I think that fear is a useful mental state when there is real and imminent danger. In startup land, you are right to be fearful, because you are much more likely to die than stay alive.
If you don't have the luxury of unlimited shots at success (due to a lackluster safety net or other life goals), it makes sense to maximize the likelihood of success in your current venture. There is a lot of "startup cost" to working on a new idea, and in a lot of fields, you will eventually succeed if you just stay alive/don't die.