I read the part where the professional sharpener called it a "myth". Ask my kids if it is a myth. Many years ago, Fiskars were quite expensive, and I had 2 pairs. Not being able (or willing) to find the cheaqp scissors, my kids used my Fiskars scissors. I noticed the difference immediately, and any fabric that was cut with those scissors turned out choppy. After my kids had to use their allowance to buy a new pair, they never touched my "fabric" scissors aqain.
I stil have one of those pairs of Fiskars, but now my kids are all grown and moved out, so I don't have to worry about my scissors.