I bust wood arrows all the time. Gives me something to do this time of year making more.
Here are three dozen Douglas fir (I hand taper the last 12" down to 5/16") that may not make it to next year. Half a dozen will get judo points, a dozen get Ace Hex blunts, a dozen get field points (for targets) and the last six get plain blunts. As I break them I swap off field points for whatever was broken or lost.
It is more than worth it.
On the other hand - I have four arrows left from a dozen I bought from Howard Hill Archery in 1982 that have been through stump shoots and bunny hunts annually since then. Some stumps are soft and some arrows lead a charmed life. I've gone days with 60 shots on one wood shaft that I still could put back in the quiver. And then there are the days when six get shattered.
I used to shoot PPC and figure 120 rounds of .38 Special, even reloaded, plus entry fee was going to blow $35 a day. That's six well-made arrows . . . and you can usually find and re-use the points. I even salvage fletching occasionally.
Neck, if you look at what som,e folks blow on cigarattes wasting a dozen arrows a month instead would be a huge savings.
Have a stink-pot boat? A dozen custom arrows is one day of fuel on the lake.