BUT - the strategic objectives did not fail for this reason.It's hard to quantify the cost of the bad PR that comes from killing children and grannies.
The military objectives of defeating the VC and North Vietnamese were still outright successful...The 'failure' in Vietnam was a geopolitical one
The programming objectives were successful...the startup's failure was an economic one. Right here, we go up one level of abstraction, and we see the more fundamental failure. Does it really matter how good the code was, if your company goes bankrupt?
My point is - the two are separate issues.
No. One is a means. It's a form of implementation. I should sincerely hope you aren't all about "art for art's sake" when the "art" in question is military action and deadly force. As for the 2nd thing -- the actual goal, living up to values -- that gets to the crux of the true failure.
The now accepted view of 'body count was misleading' actually did not fundamentally affect military outcomes. It was a bad measure, but the US still one. It affected some things, maybe a 'shock' to public opinion, but it was not existential in terms of changing the military outcomes.
I went to a military academy for a boarding school. I had a 1903 Springfield rifle (disabled) locked to a rack in my room. I was taught by Vietnam vets. I think the majority of them would agree with many parts of your assessment, but I suspect at least some of them would be aghast at how you're missing the point. Does it matter how a military or a government achieves it's objectives? Unless you think the ends justify the means, yes it does. Does it matter if the actions align with your values? Yes it does.
You, yourself, have noted how the repercussions have reverberated down the years, but I'm not sure you're correctly interpreting what that means.
In a way, it's the same sort of mistake made by the worst of the authoritarian SJWs. Let's say you use technically legal force, bureaucratic pressure, and bad PR tactics to frighten and coerce people into doing what you want, but in doing so you convince nobody while violating a bunch of values, principles, and feelings -- what does that actually get you? It gets you further from the underlying goal. By the same token, let's say you use military force and kill or frighten everyone opposed to your client state, what does that really get you? If you've turned enough of the populace against you, it gets you less than what you had before.
In 2018, winning is through convincing, not coercing.