Maaaaybe (but how was the group chosen? It's a bit like the "We'd offer childcare if we had any female employees" thing etc). My experiences with accessibility have made me very cynical. I'll admit, however, that I don't know enough to say they wouldn't or didn't.

But: in the hypothetical situation that you had a group of ablebodied kids and an inaccessible playground, you couldn't easily change it if a new disabled kid joins or one of the old kids becomes disabled.