"You should not resent the gains of the wealthy because capitalism is not a zero-sum game. A rising tide lifts all boats."
This argument relies on metaphor rather than math for a reason: the math sucks. Let's look at it objectively: according to Business Insider, as of March 2024, the wealthiest 1% of Americans have seen their wealth increase by 49% since 2020.
Based on GDP, the size of the American economy has increased by 28% over that same time. Therefore, while the economy is not a zero-sum game, it is not growing quickly enough to explain the spectacular wealth gains of the top 1%. Clearly, much of their gains have come at the expense of everyone else. That's just math.
This is why math is better than metaphor. But if we're going to stick with that damned rising-tide metaphor, then consider this: if your boat is rising much faster than the tide while someone else's boat is rising much slower than the tide, then something weird is going on, and you are LYING when you say it's just the tide.