My solution does anticipate real-world human interactions: don't give rich landowners tax breaks. This is baked into the premise of having a high tax. A tax that is effectively not-high is by definition not a high tax, ergo is not the solution I am proposing. If I proposed a solution of "have a tax that is claimed to be high but actually is not," then your response would be valid. But my solution was: have a high land value tax.

Your solution is dismissible by your same logic. "While removing any and all subsidies is well-intended, in practice real-world human interactions dictate that will not occur."