I think that would hurt startups much more. It will require that the degrees are accredited, which is a lot of work for both the institution that provides certification and for people applying

Secondly, a large percentage of developers do not have a CS degree. There's also a significant number of educations that are not specified as a CS degree, but still teach people skills with the aim of them entering the workforce to work as developers

It's also unclear how domains where software is developed as a tool, but isn't a primary focus (i.e. bioinformatics)