It depends on a lot of things. But since OP was talking about 5 DTE ATM call spreads on individual stocks, I tailored my advice to that. Also, you're talking about statistical risk, and it's 100% correct. But statistical risk matters when you have a large enough sample size (i.e. million dollar market making portfolios). When you're talking about small retail investors, absolute risk is more relevant to position management than statistical risk because crossing the strike is around a 40% event given the credit he took. So to double the spread, you'll take about .06-.08 more in premium to cover the 6-9% event that brings the further OTM strike into play. Makes sense if you have 20+ spreads open at any time--I suspect that's not the case here.