I'm not convinced it can be expected to cause negative outcomes. It certainly can cause negative outcomes, but I wouldn't say that's my default expectation. I've exhibited the tendency to procrastinate until a deadline looms my entire life. I'm here on HN, doing it right now. But I've never missed that deadline, and would immodestly say the results have always been pretty acceptable to excellent in every case I can recall. I'd rather treat it as a way of approaching prioritization—worthy of study, but not to be treated automatically as a problem except on a case-by-case basis.