"The prevalent attitudes are if the bow is not made from osage or yew it is a sub par bow no matter how well is shoots."
With some folks perhaps, George, but not me... well, not exactly. A good bow is a good bow... and means the bowyer designed and tillered it with the strengths and weaknesses of the wood species as his guide. Osage and yew are not immune to limits. IMO, the best bows push the limits of the wood species used, but don't excede them.
It's only necessary to account for those weaknesses because all bow woods are NOT created equal. Most tree species are virtually worthless for wooden bows. Many are good. Few are great.
If a bow is designed and tillered to suit the capabilities of the wood species without being overbuilt... if it meets my other functional, practical requisites of a 'good bow' like balance, tiller, timing, fit, finish, etc... if it's truly a good bow, I respect if for what it is. I may only consider it a sub-par bow/wood then, because it was unable to suit my design preferences due to its limits.
But the main reasons I don't use red oak boards for bows is... I like to select, cut, and care for my own bow wood, or fully trust another competent bowyer to do so. I would sooner cut a red oak tree to make a bow than use a board selected, cured, and cared for with only static applications like shelving, furnature, etc. in mind. I also prefer my bows short, narrow, fully radiused, and with some character perhaps. Basically, I think red oak boards just have too many detours for me to get to where I want to go
Has osage spoiled me rotten?