I will agree it is always bedst to do it right and use the correct materials. But what is correct for one application isn't always right for the same application on another boat. Read what L. Francis Herreschoff had to say about recanvassing a deck. Use the cheapest natural cotton sheeting you could find. How it was bedded down was more important that the material that was bedded was his thought. I read the exact opposite recently in an old Small Boat Journal.
Pete Culler was infavor of using Long Leaf Yellow pine for decks and deadwood when weight wasn't an issue. And only God knows for sure what Phil Bolger thinks. :-)
My first live abord hull was a 40' Matthews stock cruiser. Mahoganey on bent white oak with 'Hoganey bright work. My second was a 30' Richardson cruiser with a cedar hull on bent white oak and 'hoganey. Both were strictly freshwater boats up to that point. Both hulls were strong and tight and both boats were built in 1935. Different woods doing the same jobs very successfully.
I'll bet you and I could kill a tub of stout and swap builders stories for hours. And swap the odd tune to boot.