I've never been a fan of any kind of standardization in golf course architecture, and that includes fairway width.
Did you know in the old days most all fairway widths were standardized around 50-60 yards?
Did you know that most all fairways in the modern era were standardized to around 30-35 yards?
There are a few interesting theories of why those fairway in the old days were of that standardized width but I don't think anyone really knows for sure. I think we can be much more certain why most modern fairways are app 30-35 yards.
I don't like standardization in golf course architecture but if I had to chose between wide standardized fairways and narrow standardized fairways, I'd chose the former every time.
However, in my opinion, it just isn't all that hard to look at any golf hole and analyze its various strategic offerings (generally its green and architectural green set up) and figure out the ideal fairway width and shape to use with it.
On most good golf courses you have some small greens, medium greens and big greens. There's clearly architectural and strategic reasons for that, certainly not the least reason being variety.
Why should fairway widths of various golf holes be any different? Give the golfer variety of widths off the tees by tailoring the ideal fairway width of a golf hole to what makes the most sense wth its architecture and strategy concept. It's not hard at all to figure out by just analyzing any golf hole, particularly its green. And if one did that they'd probably come away with some very wide fairways, some medium ones and perhaps some narrow ones.
What in the world is wrong with that? At the least, I'd think it would get any golfer's attention better on every tee compared to the same width fairways throughout, be they wide, medium or narrow.
Standardization suits tennis courts not golf courses.