Earlier quoted context omitted.
This was one of my professors favorite gripes. He loved to tell stories about how companies would reinvent algorithms (usually multiple times) that had been published in the 70's and 80's
The problem here is search. The problem may have been solved, but finding the relevant paper is like looking for a needle in the haystack. It doesn't help that terminology has changed during the years...
And training.
I've had to reinvent algorithms I know already exist for my hobby work because they were invented to solve another unrelated problem I'm not familiar with and phrased using domain language I don't know.