Well if players can instant travel to each other to get added benefits I would like an instant travel wing feature too...you know so that it is fair.
Is just not the same. What are you supposed to do when you are trying to fill your ship with crewmembers, just wait in a station? what if you already have another member, but the third one is coming, should the two players wait? When you are in a wing you have full independence. You can play the game as freely as you want while you wait for the rest to meet you. In other words, wings don't limit your game in any way. But with multicrew is different. If you make it so that you need to meet, you limit your playtime to just waiting.
Also, what is being transferred in this case is only the avatar, not the ship. Once the crew is disbanded, you are back where you were on your ship. Instant transfer of ships for wings would totally brake the game. It would make the size of the galaxy meaningless!
This point is crucial when you have a full time job and/or a family. Try to make different schedule and timezones coincide. On another hand, I don't think "fair" is the right word. How can this difference be unfair? However, I do hope that, if legs arrive, then there will be a wait to multicrew the hardcore way.