In the long term, correctness may become more valuable. An analogy: when factories first switched to electric power, they simply connected electric motors to the existing driveshafts used to distribute steam power around the factory, and only realised small improvements in productivity that way. But once factories were more fully converted to electric power, it became possible to rearrange machines to suit workflows (rather than being arranged around the driveshafts) and this lead to much bigger productivity gains.
That's not true. People just don't know any better. Look around you and you'll see many people using the wrong tools. It doesn't mean they've made a rational decision to use those, it usually means they're not aware of a better alternative.
Perhaps there is a systematic undervaluing of more polished, robust custom solutions by excel users across the world. That could be the case.
But there is also probably an under-supply of adequate custom solutions. I have seen comments over the years on HN from people who have had much success in consultanting gigs where they simply built custom tools to replace ad-hoc workflows and processes living in places like Excel.