I felt like cheating jumping to the Forge with Lae'zel and then teleporting everyone else in through the waypoint. And it triggered the following:
The teleport system for fast travel does not make sense. The destinations do not make sense. The placement and frequency don't make sense. No one would build a teleport system to cover a distance of a few minutes walk in the wilderness. The rest of the world not using these extremely powerful and unlimited teleporters especially does not make sense. Being able to escape a non-escapable location, like a small platform hanging in the air or a rock in a sea of lava, by teleporting to a waypoint doesn't make sense. Teleporting out of the Underdark doesn't make any sense if you just jumped down a hole and have no idea where you are.
It's a weird mish-mash of a player convenience game feature mixed with an unnecessary magical in-game explanation. Magically teleporting all the time just for fast travel really takes the magic out of teleporting. It also takes the traveling and sense of distance out of adventuring.
And finally, magical teleporting is not the primary means of travel in Faerûn. And BG3 should respect that.
It could have been accelerated movement on a map and it would have made perfect sense.
Reaching the Forge could have been done in many other ways without involving a cheaty nonsensical magic portal system. How about a rope?