No we don't. Waterfall is probably the only way of managing large quantities of differently skilled people on a software project and actually getting somewhere

No we don't. Waterfall is probably the only way of managing large quantities of differently skilled people on a software project and actually getting somewhere though. True agile is for very small teams of highly competent people only, which are rare. There are some corrupt organisations out there selling process models which tell you you're getting the latter but actually sell you waterfall again with bits renamed. This drives people away who are sold the agile model at an interview because the people who are invested in it in the organisation don't know either process well enough to rationalise it. So people arrive, realise it's a shit show and leave again quickly. That's reality and it sucks. I think people need to talk more around the social and political structures of organisations that drive the process model rather than two camps because there's infinite varieties of both ways of doing things.