Most small engine carbs are made in China, have been for a long time. Stihl owns Zama and they make all their carbs in China. Husqvarna, Stihl, Echo all use parts from China and elsewhere.
But I agree Husqvarna messed up big time with the 562, 550 series of saws, poor design do to inadequate testing, QC issues and corner cutting. I do believe they got the massage, maybe they went overboard in beefing up the 572, which made the saw a bit heavier. If I were cutting for a living I'm pretty sure I'd alway pick reliability over a little weight though.
Now if say the 462 and the 500 are both reliable and light, game over in the pro market IMHO. Well unless Husqvarna has a 590 built on the same platform as the 572.
I will also add both Stihl and Husqvarna need to get their heads out of their backsides and provide a simple app and USB connection to allow users "especially the true pro users" to diagnose and update their equipment in the field. This not being available is a huge deterrent for myself, I can only imagine how guys in the field think of this.