I think the restriction on working hours ensures that management is more conscious about spent labour too. We have this (often true) stereotype of bad leads wanting employees to overwork and I would bet that’s because they assume that the team can “passionately” do more.

When I’ve seen good projects complete on time, I remember seeing my producer comb the milestone tasks asking herself “can this deliver value and be feasible”, rather than making a marathon for other people to run.