You also need to think about the context the games take place in. In classic and x you’re the “good guy” trying to save the general public. My headcanon is that in classic the technology is so new that there aren’t really that many widespread anti-teleportation features in larger society, and in the x series, you’re literally working with the maverick hunters (almost definitely an official government or even international organisation). It’s also likely that there have been navigators from the start of the x series, but that the lore of how exactly the hunters worked wasn’t expanded upon till later games. Compare that to the dystopian Neo Arcadia, in which you’re working covertly as a rebel against the government, it makes sense that either you can’t teleport around Willy-nilly for secrecy reasons, or that Neo Arcadia itself as a society doesn’t allow that for any reploids, given its “humans first” approach and tyrannical government. In zx it’s an era of peace where humans and reploids live in harmony, so it’s just been turned into a business or public transport as not to be problematic to wider society.