"People have a way of getting caught up in moments, being carried away by their emotions, and running with new ideas. They don't usually adopt a permanent attitude or behaviour based on the absurdly distant future."

I mean, I think they should since it has implications for every action they take now e.g. their actions are null and void in the face of heat death, among other things- that matters now. But I don't think this is all that important to discuss, because it's another thing altogether to talk about what is the case. People think they're leaving their mark, making a difference, etc. but are in fact only constructing what is to be destroyed. Adding time in between doesn't change that and only adds the illusion of lasting effect. I wonder, for example, how many people would bother writing a lengthy autobiography if the manuscript were to be immediately thrown away upon finishing it and the person's memory were to be wiped of its contents.

"2000 years ago in the city of Pompeii a parent had love for their child, a man gave a beggar bread, and two lovers shared an embrace. And absolutely none of it matters to you or me, or anyone alive today, but it mattered to them and that was enough for them."

This example only matters at all to anyone because we're here to be aware of it. This example is less touching than it is depressing, which is more or less my point.

"What colour is the dress? Was that a rabbit or a duck? Do you see Rubin's vase or two opposing faces? If meaning were universal, if it were objective, we wouldn't be having this conversation. There would be no arguments about what it means to love or the meaning of a cigar."

Frankly, apples and oranges. People do find similarities and come to similar conclusions about meaning all the time. A more analogous set of questions would be: "Is that duck forwards or broadside?" or "How red is that dress to you?" which involves the subjective element of the observer superimposed on the objective reality. To your second point, that's plainly false, as people come to different conclusions about objective matters all the time. The students in a calculus class have different answers to the same math question, but that doesn't mean there isn't an objectively correct answer. Misperception of an objective thing doesn't make it not objective.

Sidenote: This last part of the discussion on meaning is interesting and all, but it's really not relevant to the main discussion, since I agree that on naturalism, there is no reason why meaning would be objective.