Is it, in general, better to take actions that could be described (variably, according to your moral temper) as sinful, or wrong, or regrettable, "in your stride", rather than feel guilt if it is the case that guilt will not diminish the probability of its happening again?
Is guilt something irrational in the sense that we would really be better to (i) rid ourselves of it (ii) discourage aspects of the upbringing of children which conditions this response in them, so long as there are other ways to disincentivize harmful behaviour?