It's good enough, it gets the job done and does not cause enough friction for the person to feel the need to improve. Complacency.
Poor typists always slow down processes, and frequently become a bottleneck, local or global. If you can speed up a process by only ten seconds per Thing, by improving someone’s typing skills or by fixing bad UI and workflow, you only have to process 360 Things in a day (which is about one minute per Thing) to have saved an entire hour.
It can be very eye-opening to watch a skilled typist experienced with a software system that was designed for speed, working. In more extreme cases, it can be that one person can do the work of ten. In more human-facing things, it can still be at least a 50% boost, so that two skilled people can beneficially replace three mediocre.
We seem to value the actual craft less and less with each passing day. so everything slows down overall.