Indeed, you are correct on every detail of this point. There has been considerable discussion about this in the past. I've made the same point- that we must emphasize what is the same, and what is better, not what is different. We can't expect people to accept a lot of "different" if it is not clearly "better".
Some rugged individualists will go their own way and pioneer this even if it is difficult and dangerous. Most people will not leave comfortable routine for love, or money, or even if the barn is literally burning down around them.
I think it is possible to give people "fairly equivalent". This doesn't mean $30, $50, $100 million in upfront cost. It means about the same comforts and space as their single family home or urban condo/apartment for about the same cost, only in a novel environment that appeals to their sense of adventure or other advantages. It means they have a means of maintaining themselves financially, doing either the same type of work they did on land, or something that appeals to them more but has roughly equivalent compensation and potential for advancement, or something that appeals to them so much as a cause (healthier lifestyle, reef restoration, or libertarian paradise for example) that allows them to justify taking a cut in compensation.
Right now, the wife and I have a monthly expenditure of roughly $1000/month in boat loan, moorage fees, insurance, etc. We have additional maintenance (recently, a LOT of it, thousands of dollars- we bought a used 35' vessel and had it trucked from Connecticut to Portland Oregon) and fuel expense. We use the boat most weekends, and occasionally weekdays. We also tend to go on vacation, usually once a year, sometimes twice. We're fairly frugal, we bargain hunt for that, but it's still a couple thousand for the two of us to go to Mexico for a week or so. For us, an easily accessible warm weather seastead destination with good diving, great food, some minor social life, and moorage for a pleasure boat would probably be worth up to $10k/year if we could use it regularly. It would substitute for most of our vacation time, and some of our local boating time. If we could offer it to friends and family for use, more so.
That's almost a home mortgage, when you get right down to it. For someone who wants to permanently move to a subtropical destination, and live a different lifestyle, it's a bargain price.
So there... I 'demand' a seastead. At a reasonable cost.
Thank you, and don't worry about it. I've been thinking about this for many years. I won't stop thinking about it any time soon. I don't consider myself more able, I simply have a perspective that I hope is valuable to others in their own endeavors. I appreciate your contributions to this discussion as well, and look forward to seeing you succeed. If I can be of help, I'm always available privately as well.