Growing something in a lab is one thing. Getting it to work inside the human body is another. The goal is to place these developing teeth into the jaw so they keep growing there. If that works, lab-grown teeth could connect to nerves and blood supply like natural teeth do.
That is the part that really matters.
Because if they behave like real teeth, not just look like them, then everything changes.
But there are still problems to solve, and some of them are quite practical.