If this was faster than riding a horse from point to point, I could see the argument against it. If it’s about cart speed, then I see no issues with it.
It would be a cool way to add another NPC like the wagoner. Make it cheaper (maybe half?) and perhaps a cart load of passengers. Maybe allow you to remotely summon your own from another deed with a “bus stop” (but it has to travel to you). And add permissions on who can use it (so others wouldn’t tie up the service if you didn’t want). Maybe allow log off after setting off and it’ll dump you at destination for when you log in (so maybe heading back home before you log for the day).
That’d give a slower but less active way to travel. Going yourself by horse would still be the best, but this way would give a more afk option without being overpowered insta-travel.