[lewisl9029]

I think it has more to do with the fact that in the case of Google, Facebook, etc, i.e. everyone that takes software practices seriously, software is their product. They live and die by the quality of their software: how fast it runs, how bug-free it is, how easy it is to change and extend, how well the reputation of their software practices can attract the most talented software developers, etc.

For everyone else, software is an expense: it's something to be minimized and gotten over with as quickly as possible so they can direct their resources towards solving business problems in some other domain that actually brings in the cash.