[Spoiler?] Is teleportation just a player convenience and not a real thing?

[Riepah]

I think some pointed out how 4s (to cast teleport) will equal to less than 2 min in eorzean time. They also had arrows, so casting teleport will make you an easy target.

Going by gametime is meaningless. If a 4 second cast takes 2 minutes of game time, then a 4 second walk will take them 2 minutes of game time as well. Looking at game time versus real time makes no difference at all.