Seizing domains is a lot more common than it used to be though, enough that it's a real concern for me personally, and I'm not sure there is a viable solution at the moment. There is also the concern of countries/governments or specific ISPs simply blocking access to one's domain in various ways... and the number of authoritarian regimes that have been blocking large portions of the Internet has only grown with time.

And regarding DNSSEC... if your domain is taken by the registrar (court order, ToS violation, etc.) or a government that can command the parent TLD to act, they can just revoke your old key and transfer the domain to someone else (or setup a placeholder under their own DNS) and now your protection and all concept of ownership is completely gone without your consent. This happened a few years ago with Epik seizing the soyjakparty and kiwifarms domains, including their hosting from a subsidiary company Terrahost... and KF has never even lost a lawsuit, but there are some specific people that really don't like them, and have gotten adept at claiming ToS violations via every possible company that touches them in order to try to make them go away.