Or they may have experience with people that walk in and declare all code as "insecure" and "dangerous" or "unusable". They usually promise the world and deliver a small fraction, if even that.

Then, for the next 9 months delay the "1 month" project week after week. The product owners love this one. It cost them hundreds of thousands of dollars to get to square one again.

And all of this happening to a product that wasn't released yet.

At the end, the developer quit and everyone in the company agreed that it was good to see them leave.