I understand how a scorer works....it helps "cream" the corn even finer by cutting kernels versus just scraping it off the cob.
However, having had to shuck corn/scrape all the time growing up.....it is a very messy affair. Just can't imagine it being done at a table...especially with guests. Now, having kids with braces and we are having to cut the corn off the cob for them....a knife works great!
Makes me wonder if it was more or less a specialty item....like an invalid spoon....but even more specialized!