Have you ever had coca tea? It’s amazing - way better than caffeine. It’s more gentle, but stronger - like it gives you more energy, but you don’t get a hard crash, it’s less likely to make it hard to sleep, plus it has all sorts of health benefits - being able to adjust to high altitude for one
Cocaine probably shouldn’t be sold at the drug stores, but it would be amazing if we treated it like caffeine - you need a license to buy it, but you can get the leaves or products made for it
Plus we could make a path to legitimize cartels and stop getting people killed over the the war on drugs, which would be nice
I think that’s a very strong argument and a great metaphor, but you forget relativity.
All reference frames are valid - you could say the Earth and the people are moving and the train is stationary, you could say the train is moving and the earth and people are stationary, or you could say they each have a vector moving around the sun or anything else
But when you travel through a portal, the only valid reference frames are you and the entry portal. Your momentum relative to the Earth doesn’t matter - why would it? You can open a portal to the moon and jump through, and we see momentum is preserved. The Earth isn’t a special reference frame, it’s just the most noticeable one.
So let’s pick the reference frame of someone on the track. Let’s look through the portal and say there’s a sign on the other side - as it approaches, you’d see a sign approaching you through the portal. Relative to you, through the portal the sign is moving at 30mph. The portal passes over you - you haven’t moved, but you enter a new reference frame, a frame in which the Earth and everything on it is moving at 30mph