Yep, agreed - should walk up the stairs, to the door, or ladder, and then have the teleport transition from there. While I'm not one of the "ship interiors" criers, anything to make it feel just that bit more immersive would be nice. Alternatively why bother with that blue portal at all, just have a wrist-unit/visor menu item to board your ship whenever you're close enough to the ship.
Clearly the blue portal is the generic "ladder", at some point you need a marked out zone where the boarding option activates, but the blue zone neatly avoids clashing with ship lore. There is a complication even with the idea of a compromise generic boarding animation as the entrance to the ship is actually ship specific and that sort of detailing becomes embedded in the lore. I can see why it was distanced from as it would become a per ship asset.
I would actually put the point that choosing such a stark differential between outside and inside could actually be promising in that ship interiors could be closer than we think, if "ship interiors" was still merely a distant wishlist then throwing a quick win bone of doing an animation specific to each ship would make sense, but it becomes more wasteful in dev time the closer a dedicated content release would be e.g. if it already had a detailed development project timeline.
I'm interested in speculating that this could actually insinuate that ship interior is planned to be interwoven with the exterior aspects of the ship. It would then make the entrance aspect more demanding in the detailing. They have already said that content will only be revealed with new gameplay attached, it seems that ship interior gameplay might need to contemplate external aspects of the ship, for example we know that hostile ship boarding gameplay is on the wishlist as well as EVA.