People are destroying their knives in the dishwasher.
The handles come apart, wood swells, bolts corrode, glue fails, edge bangs on the metal rack dulling it to all hell. Chemicals and heat wreak havoc on the blade, microcorrsion on the blade and edge pits and chips it. Sharpening them out to another pit which turns into another chip.
A knife maker has two options, educate folks so they can actually get the performance they deserve and the user changes behavior so they can acutually get performance.
Or lower the bar and cater to the lowest common denominator.
Bomb the edge performance out to compensate for abuse. Also it's more cost effective to make knives that solely designed to compensate for misuse.
This is fine, can just be preference, not everyone wants or needs crazy performance nor cares. Things work good enough for most folks even when considered horribly dull by others standards. However, if you DO care, you don't ever use a dishwasher on your knives, EVER.
Just figure out what you want is all.