I 100% agree with this. The navigation of WoW interfaces and UIs completely rely on player exploration and feedback to the community via Wowhead, Discords, streams, guilds, and etc. A new player likely does not know about these communities (or is not a part of them). So, they are completely reliant on WoW interface to direct them to on what to do for their core content.
That being said, if the quest “I Believe I Can Fly” results in them not being able to fly where they are questing, then I would imagine that this would spark confusion and potentially frustration.
If I were given a vote, then I would vote to allow for players to skip the BFA Pathfinder for a new, smoother first play-through experience. For those familiar with my difficulty value preservation post, this may come across as counter intuitive, but this reduction of difficulty would result in better health in the game (especially for the new player experience). Link here: Discussion: Skill-Based Difficulty, Time-Based Difficulty, and Value Preservation
In other words, the experience of a new player in their core content (in this case, leveling) is critically more important than preserving the value of an achievement (of which, 80% was achieved by simply playing current content).