Is it true that there is no absolute morality?

[Nonpareil]

You say, for example, that a sentient agent is not required for an "opinion."

No, I don't. I say that your ramblings about agency are irrelevant, since they don't change the fact that you are using the words "subjective" and "objective" incorrectly.

You've said a subjective truth is "not true from every point of view."  Why don't you give an example of a truth which is dependent on perspective?

We have been over this. Opinions.

You've defined "objective" as "true from every point of view."  Why don't you give an example of an objective truth

We have been over this. Facts.

You can say as much as you want that I'm using terms incorrectly, but you haven't established that your definitions

They are not "my definitions". They are the definitions.

are robust enough, or coherent enough, to provide any utility in actually talking about morality-- either moral ideas, or the capacity of some species to act based on moral ideas.

You have yet to make any coherent statement as to why they aren't. You just ask a lot of incoherent questions, based on your misunderstanding of the terms and inability to keep them separate from unrelated concepts in your head.

I'd like you to get out of the online dictionary and actually immerse yourself into the real-world implications of morality in human beings.

I understand the implications.

You're still using the words incorrectly.