For a view camera, precise alignment is not critical. Plus, since the alignment is adjustable by definition, any view camera will have some degree of difference from what might be "perfect" if you were to measure it with lasers or whatever.
What matters is that the back is accurately flat so that there are not light leaks around the holders, and that the film plane match the focus plane of the GG.
Wood cameras can accomplish that just fine, and if there are issues there, it can be corrected. Richard Ritter offers that sort of "tune up" service, for example.
If your work requires critical alignment for example to keep right angles in the subject perfectly square, you can use a gridded GG or perhaps some sort of mask to ensure the lines are rendered the way you need. If that is a requirement, you'll need a way of checking it no matter how precise the camera is. Even if the camera is all metal with dovetailed mating surfaces there is always some play or backlash that you would need to account (and adjust) for.
In practice, for 99.999% of subject matter, critical alignment is no issue whatsoever. Where it is critical there are many more things to worry about than just the camera's precision.
Finally, wooden cameras offer many advantages, they are light compared to most metal cameras, they don't transmit vibrations, they are more comfortable to work with in cold weather, and less subject to problems in heat or cold, and there are many, many more choices second-hand and new.