BTW, I will say that Tom Marzolf, on behalf of ASGCA and the USGA did produce a "expected life cycle" chart of golf course components. I can see where cynics would say its a shill for needless remodel, and I am also surprised at how many in the biz latched on to this as a bible to tell folks when to expect to remodel, with the emphasis often on, "now."
That said, most golf course components DO seem to last what the chart says, which is about 15-20 years, although there is a difference. For example, a well designed irrigation system, with flow velocity under 4 FPS rather than the more typical of the 1980's 6 FPS will probably last 25-30 years, which I have confirmed with my own observations. For a while, we all built paths with fiber mesh rather than steel mesh or steel bars, and those are falling apart, whereas something stronger probably would have stayed. I always spec 6 sack concrete, but most paths are 5 sack, when a chart would show really increased strength right at 6 sack, with taling off bennies for going 7 sack, etc..
In other words, saving money up front costs more in the long run and you get what you pay for, but golf has always been a tough biz, and the tendency to poor boy it has always been there.
Lots of the components that wear out on a golf course were from those poor boy decisions. Greens are an example, too. USGA research has show that California greens tend to wear out a bit faster. The gravel layer keeps the soil from interfacing with the sand, and evens out drainage, both of which can shorten life spans. So many courses are built with cheaper sand which might not have the characteristics really needed.
Bunkers built the standard way don't seem to last five years any more. Tiles clog, fines migrate to the top, etc. etc. etc. Liners help, but I am currently assisting my second rebuild of bunkers on a course since they were built in just 2003.
Short version - nearly all golf courses do need renovations at some point. Maybe not every component, maybe not the greens, although they are important enough to warrant the best attention. Acknowledging that reality in an educational seminar doesn't make someone a villain. It does happen.