They got used to bluster and thinking that they couldn't lose - exactly the same as happened at the big investment banks.
Precisely.
Competition pushes businesses to compete ever more aggressively. Those who do not - get bought out by the aggressive.
And where success depends on outside factors (eg rising RE prices) and those factors reverse (or eg patents all failing) you get dramatic effects or even failure.
ij
It is astonishing what foolish things one can temporarily believe if one thinks too long alone ... where it is often impossible to bring one's ideas to a conclusive test either formal or experimental. J.M. Keynes