Seasteading is all about sovereignty. Living on a boat on a lake makes you subject to all of the laws of your nation.
Seasteading is about not being under any laws of any nation and building a new society with a blank slate.
The only way to do that in the past was through a violent revolution. Seasteading is doing so peacefully.
As for waves (and the inevitable "pirate") questions, check out
https://ocean.builders/faqThe political part is fine and all, but it doesn't answer my question. Why don't you just buy a fine boat and call it a home. Why do you need something resembling a floating house? OH wait, this goes on top of a stick? So its even worse...
Also if the
Principality of Sealand teach us something, is that unless you are really far deep inside international waters (preferably moving), you can at any point be subject to the laws of the nearby country. Thailand is a monarchy, and quite strict at times, with a military junta... Funny place to start the experiment.
There is also something about rights to adjacent waters, called exclusive economic zone or such, which can go quite deep if you are anywhere near a country you will very like be subjected to.
On a closer look to the concept of seasteading, i particularly like the idea of building underwater, but this could very likely become a new country. Not sure how humanity will react if a true settlement is built, say, in the middle of the pacific ocean.
I think people miss the point that this is a proof of concept. A prototype.
When a car company spends millions on a new model car prototype do you say "why not just go buy a car from the dealership? It's a lot cheaper".
This is going to be big. Living on the land is for the animals. The next frontier is above the waves.