But it's that if there's anything executives are good at, it's looking at graphs, extrapolated trend lines, and setting deadlines before disaster strikes. This is basically one of the core, day-to-day competencies of the executive suite, because there are so many things that can go wrong regarding finances, infrastructure, legal, etc.
There are plenty of things executives can be bad at managing, e.g. when it comes to tech debt or user experience or company morale -- especially anything subjective or hard-to-measure like these.
But capacity planning for any measurable resource, be it an internet pipe or otherwise? This is MBA 101 stuff. So this particular story just reads like a fantasy of "tech people smart, business people dumb". If an executive team couldn't handle something this simple, there's no way they could have been running a functioning, established bank in the first place. It just doesn't add up.