Earlier quoted context omitted.
> The confusion here probably comes from the past tense phrasing. Possibly pedantic, but, that's the simple conditional (which, in this particular context without an explicit condition, has the implicit condition of "in similar circumstances"), not the past tense.
Apologies for out-pedanting you, but I believe it is still called the past tense. English past tense (a grammatical form) can be used in several situations, the dominant being signalling past time , but also used to signal conditionals.
No. In "If we were in similar conditions again, we wouldn't do the same thing", the condition clause ("If we were in similar conditions again") uses the past tense, the main clause ("we wouldn't do the same thing") uses the conditional mood, which is marked (in this case) by the use of the modal verb "would".
In the sentence "We wouldn't do it again" where the condition is implicit, there is no use of the past tense, only the conditional mood.