One of the most interesting arguments on this is the Torres "Cardboard Guitar". One link below:if you know what you're doing, one can build a good guitar out of almost anything.
https://www.cumpiano.com/torres-cardboard-guitar
Out of curiosity Robbie O'Brien used a similar approach and did a video on it:
https://www.youtube.com/watch?v=_elx2OvWN58
I doubt people will be lining up for cardboard guitars but its a great demonstration.