That’s a bit reductive. You may be right, but it would be less facile to say that poor designs can be made by anybody, but that a mismatch between design and business objectives led to bad results. Not all business people are morons, and not all designers are good at design.
If the business objectives lead to a design so bad that it hurts the business, surely the people who came up with these objectives didn't do a very good job?
Rather it's an engineering-first organization, run by an engineer.
Probably a mix of everyone's fault.