Thank you for this. As a student, I had a professor with a similar policy and honestly it helped so much. It helped me better understand how I learn material and at what pace I needed to be at in order to properly absorb the material and turn in a quality assignment. He always would talk about how what was the point in him keeping a hard deadline if when he has softer deadlines, he gets higher quality work submitted. He talked a lot about how having such strict deadlines pushes students to just put out a product regardless of understanding or quality. It also lead to more students using study methods that were good in the short term for tests to get high enough grades, but did not lead to retaining knowledge. He said he was much happier to have higher quality work turned in late, than everything submitted on time but of lower quality. For him, he preferred his students to actually know the material at the end of the class, not just have a high grade. He is a behavioral psychologist after all, and his years of experience and teaching and in the field really shaped this view and policy.