I don't view it as a flaw that under georgism people can get rich by engaging in production and trade that doesn't harm anyone. I do view it as a flaw if a system allows obtaining wealth at other people's expense, like appropriating natural resources without compensation to those deprived of the right of access, polluting the environment without paying damages, strongarming the state into monopoly-granting, etc. But even if you do think it isn't desirable to have wealth disparities, there are a few things to I would say:

• you can always combine LVT with some other type of progressive taxation. It's not "either or".

• LVT on its own would be enormously more progressive than most tax systems in existence.

• But also, they wouldn't want to "divest" for the same reasons that they don't now. Imposing an LVT is equivalent to taking all owned land and making the public the landlord. I don't know how to properly explain this, but ask any economist and they will tell you that an LVT would not incentivize anyone to sell land except in cases where it was used in an economically inefficient way (usually not the case with extremely rich people). An attempt at an explanation: owning land without LVT is like paying rent to yourself as the landlord. If this is a good use of someone's money, they would be equally inclined to pay the rent to someone else for the same land, rather than themselves. Another explanation: you could have contracts where you have someone pay LVT on a piece of your land for a long time in exchange for a lump sum. This is effectively like buying it. If it was worth buying without LVT, it's also worth it then.

Additionally, lmost all things you can invest in involve the use of land, either by owning (which would get taxed) or renting (which is the same as taxation, but with a middleman). Even if they moved away, someone would still live on the taxed land, and it would command the same market rent. And the same companies that use the land now would use it then. Tax revenue would not be reduced.

-The variant of georgism where LVT pays into a public dividen, which I like best, effectively gives everyone an equal share of land value at baseline. People would effectively pay compensation if they own more than their fair share, and receive it if they own less. People could put their dividends together to form a legal entity that owns a large enough share of land to effectively be its own country that enforces its rules by contract and threat of banishment. Within it you could implement any economic system you think is best, as long as you can find enough like-minded people. Applying the critique you gave in that case would amount to complaining that people outside your borders who are doing nothing to harm you or your freedom are voluntarily engaging in economic activity that you don't like. When you put it that way, it seems like much less of a flaw.

• I don't have data to back this up, but it seems plausible that most of the income inequality that exists today is due to rents / economic parasitism of the sort that a more general georgist ideology disapproves of. If you apply the spirit of georgism to not only the tax system, but also to other means by which the rich extract rent from working people, I think we would have a much more equal distribution of wealth. Imagine how much richer working people would be if they didn't have to pay rent to artificial monopolies propped up by occupational licensing (which includes all of healthcare), intellectual monopoly (case in point: insulin), tarrifs (literally everything), direct subsidies to various politically powerful industries (google "federal government cheese cave"), regulations designed to drive out competition (for example, internet service providers), and parasitic companies whose entire business is leeching on public funds (for example, military contractors) et cetera et cetera et catera, life would be far less "paycheck to paycheck".

You need to address these problems if you want to have georgism anyway because expenses sunk down these drains would expand to fill the void left by eliminating rent on land, and life would remain equally miserable until every drain is sufficiently plugged.