Each club has to decide for themselves what is best for their membership.
Sean,
The problem with your statement is that it's not a static assessment, one that's once made, remains unchanged, in perpetuity.
The "deciding" you allude to is done every two years or so by a revolving door of members newly appointed to committees or elected to the board.
As such, there is no continuity, no duty to preserve what's valuable, or what's been decided, and, no process to assess what's valuable, as tastes, and assessments change every two years. Memberships also change for a variety of reasons, so, there's no stability with the membership or with the frequent changing of the guard.
With each new committee, board, executive committee and President the evaluative process begins anew.
What was set in stone by one board is overturned by the next. It's the perpetual cycle of "improving" the golf course and/or fulfilling or undoing agendas.
Once you understand the dynamic of governance at most clubs you'll begin to understand the tenuous nature of their golf courses.
The other factor which exerts some influence is the "keeping up with the Jones's" syndrome.
If one club in the area undertakes a project on their golf course, clubhouse, etc., etc., it's not unlikely that other clubs will follow suit, irrespective of need. It's more a matter of perception and perception becoming reality.
It's difficult to preserve good architecture.
I suspect that Tom Doak and other living architects who have created very good golf courses will have dramatic spikes in their blood pressure when memberships seek to "modernize" their golf courses 20 years from now.