Ha! I sent two cats from UK to Australia. Trust me, I know the cost. It's crazy but you do what you have to, or do as most do and leave them with people you trust. I've lived in lots of countries. Some were island nations, some not. I travelled across the borders of all of them - including during an actual war, which thankfully was a land border so drove across. It's hard, don't get me wrong. I've started from zero on more than one occasion, but if you need it, you find a way. Actual desperation means actually doing something - otherwise you're just complaining.

Everything is an excuse. If you want it, you find a way.

"Humans cannot simply walk across the border and settle" is the entire reason for MAGA, the current US administration, Brexit, and likely the next UK government, and the rise of the far right in numerous countries. People do, have and will cross borders, legally or otherwise. It's a risk, yes, but if the other option is to live in poverty, fear or under an authoritarian regime, you do it - or you fight from within. But most of you aren't willing to do either - bitching and moaning does fuck all. The apathy is pathetic. Enjoy your cage, quietly. If you want to fight, I support that. If you want to try, I support that. If you want to leave, I support that. If you want to sit there, doing nothing and complaining that nothing changes or you can't do anything, fuck off.

Edit: all of those "problems" are mostly US-immigration problems btw. You'll get in shit for overstaying a visa but not in the same way as in the US and in many countries you can apply for permanent residency once you're there, or risk a visa run (where you pop out of the country briefly and then re-enter, resetting your "visa timer"). I talk from experience. Medications are far easier to get in other places, especially life-saving ones as the whole universal healthcare. Even if sometimes you have to pay for it as a non-resident, it's often cheaper as there's less price gouging.