"lets postpone delivery of the system to rewrite everything again from scratch this month because now the coolest tech is X and I really don't want to be stuck using last months technology even though it has 0 impact to users and actually negatively impacts the business case in terms of skillset staffing and operational overhead" for starters..

> Too much tech, not enough MBA

Yup. Left to their own devices, engineers will chose to do what is “coolest” using the hippest technology stack and the most pure architecture imaginable. And they’ll build something and it will be cool.. to them.... but it won’t solve any business needs or will solve the wrong ones and not deliver as much value as it could have if it had somebody with a good business head on.

...or they’ll go reinventing the wheel and build massive costly systems that should have been purchased off the shelf from a vendor.

Nope. You need a balance. It isn’t enough to just have tech smarts. You need somebody with business smarts to keep things grounded and solving real business problems that deliver value to the customer.