Inaccessible to enemy tanks, yes. The UK, Switzerland, Australia, Japan, etc all benefit from the fact that it is very hard to march an army into their territor

Inaccessible to enemy tanks, yes. The UK, Switzerland, Australia, Japan, etc all benefit from the fact that it is very hard to march an army into their territory and thus they can build factories and infrastructure confident tjhey're not going to be destroyed, and engage in trade freely confident that they are not empowering someone who will destroy them.