Such investment in technicalities to undermine the above post could itself speak of zealotry to a certain side in itself if one was prone to cynicism.

Not to mention that those nuances, as you state, mean very little. To say it was trained solely on copyrighted material or to say it was trained in large part on copyrighted material doesn't much move the needle over the fact it was done, a lot. Making a distinction between an "80 year old copyrighted work" or a recent one is also moot as it a matter of public record they themselves didn't make that distinction and happily fed on both kinds.

On to not being able to say they didn't ever do anything altruistic, well animal rights and welfare had great strides under the Nazi regime, not sure it evens out the rest. The same logic can be applied to the current state of affairs, doing a little good does not even out a lot of bad.

In closing, nuance is relevant when its relevant, after that its just being pedantic.