If you're a professional landowner and investor, and the taxes on one parcel of land in your portfolio went up because someone built Disneyland near it, this is fine. You might want to sell that parcel out of your portfolio now; or you might want to do something like build a hotel on it catering to Disneyland-visitors, which will earn you enough in profits to more than make up for the higher land tax.

If you're an ordinary person who owns the home you live in, and they build Disneyland next to it, most of the ways that the value of the land your home is on increases are useless or actively harmful to you. It's actively bad for you if you have to sell your family home and move somewhere else because you can no longer afford the taxes on it. You're probably not a professional real estate developer who knows how to effectively use the land as an investment, after all, you just wanted to live somewhere stable.

In fact, the increase of value of your land and the consequent tax increase under Georgist land value schemes, would be so bad for you, that you might decide to protestthe construction of that Disneyland to begin with. This is typically called "NIMBYism", and it happens all the time even under current property-tax schemes because the negative externalities of many different types of construction are bad for the quality of life of existing homeowners.