The problem with this is that goal-directed systems are often necessarily in conflict with each other. For instance, we have predator-prey and parasite-host relationships. And we also have zero-sum scenarios, like where resources are not abundant.

That doesn't mean you can't "be nice" by default, or that we should deliberately cause pain to others, even when it doesn't help us.

But it does mean that we can quite literally never define a truly universal morality, in which everyone is always perfectly nice to everyone.

And instead, we have to assume that different sentient systems will always favor themselves first, and their tribe / family / friends second (i.e. any sentient systems they have formed mutually beneficial collaborations with), and everyone else, a distant third.

In other words, there will probably, necessarily, always be antagonistic relationships, at least unless the universe at some point reaches some "god" state in which there is only one sentient perspective.

I've also written about this here:

https://medium.com/the-panopticon-publication/morality-is-personal-and-tribal-always-20c8c31f5d29