Smart, and not something someone would realize if they'd been too insulated from how things work.
Regarding planes/cafes/guest/etc. WiFi, I now usually put any "emergency remote plumbing access" on port 443 (though usually not HTTPS), to reduce the likelihood of some random non-SPI ruleset blocking us in an emergency.
I think that by 2050, 443 will be the only port used by applications that require a non local connection, because the chance that some participant in the network has blocked any other port is simply too high.
Regarding planes/cafes/guest/etc. WiFi, I now usually put any "emergency remote plumbing access" on port 443 (though usually not HTTPS), to reduce the likelihood of some random non-SPI ruleset blocking us in an emergency.