The military can piss away millions of dollars, and hundreds of thousands of hours, and it is not an existential situation. Oh, we bought an airplane that is broken 1/2 of the time vs. the 10% of the time we budgeted for. No big deal. A business where an investment failed like that would be in trouble. In the military, they just take that as a lesson and move on (we shouldn't buy that again, or we should not use that process the next time).
Likewise with people. Hire someone, train them for 6 months, find out they cannot do the work. The military will retrain that person. Most businesses can deal with situations like that without going broke. If you ever have a spare hour, research how the Navy selects commanding officers for aircraft carriers. The select 5 for each future opening. All highly qualified pilots with demonstrated leadership potential. Then they send them to Nuclear school. 1 Year. Then another school for a year. One or two might get a carrier XO slot, one of those will get a command. The others, they just retire them. Crazy investment. No business would do that.