According to OP, there is substantial evidence indicating about 50% of the daycares are scams. I've seen Nick Shirley's video, I don't think he demonstrated any concrete about any of the sites he visited (he's not a very good investigator), but if the 50% number is correct... well, the broken clock was probably right at least a couple of times that day.
The 2019 OLA report "Child Care Assistance Program: Assessment of Fraud Allegations" is what makes the claim that greater than 50% of reimbursements to child care providers under these specific programs were fraudulent. That estimate is broadly and bipartisanly considered to be directionally true.