Excellent point. In fact, all we can do is show the truthfulness of the teaching.
Yes, sometimes you just have to do the best you can.
I understand your point, but I am not sure it nails the Church teaching. For instance consider the following section of the
Veritatis Splendor:
Well, I certainly have no desire to “nail” the church.

But let’s be honest, the church is composed of fallible humans, and it may happen that complicated issues get incorrectly analyzed.
As an example, let’s consider your quote. It says: "Church teaches that “there exist acts which per se and in themselves, independently of circumstances, are always seriously wrong by reason of their object”. But this claims omniscience! Moreover, the analysis is incomplete.
There is an old saying that next to each huge gate there is a small door, which offers an “escape”. In this case the small door is the “
principle of double effect”. The quote says: “Whatever is hostile to life itself, such as any kind of homicide, genocide…”. But then again, a foreseen, but uninteded outcome will render the act itself
not evil! And if someone would argue that intentional, premeditated murder (and let’s not forget that "murder is a legal term) is always wrong, then this argument addresses the intent,
over and beyond the act itself - not just the act of taking the life of someone.
Of course my ethical foundation is somewhat (but not totally) “utilitarian”. When someone faces a dilemma, where only negative outcomes are possible, it is incumbent to choose the one which causes “less harm”. Some people assert that “non-action” is a “moral option”, but, of course that cannot be accepted. If one sees an upcoming event, which will cause a disaster to people, it would be an unacceptable defense: “well, I could have intervened, and prevented the disaster, but since the impending disaster was not my doing, I chose inaction, and I am morally blameless”.
Of course we diverged from the topic.
