Yes, you can. In fact, you can't have a value prioritization unless you can first define the things you are prioritizing, so this is precisely backwards.
And even if you were right, it wouldn't support—or even have any bearing on—your claim about confusing “values with real world policy execution”.
> Bob's happiness may conflict with Alice's because of how they are trying to achieve it
No. I mean, sure, that's possible, too, but beside the point.
The point is Bob’s happiness may inherently conflict with Alice’s; for an extreme example, Bob may derive happiness directly from Alice’s unhappiness. (More commonly, Bob’s happiness may defend on conditions which produce unhappiness for Alice.)
> I think when you say "goal" you are including the means to achieve happiness
No, I'm not. I'm talking about what in economics might be described as each individual’s personal utility function; the mapping from condition of the universe to the resulting happiness of the individual.