I mean, I run Dulop AEs and most of my riding is around town, probably take as many lefts as rights and mine haven't worn unevenly like that.
I have slight scalloping in that area by the end of tire life, but it's on both sides and a small amount of scalloping like what I have is normal and if you look at my tires, the scalloping is backwards front and rear but, so is the tread pattern (if you turned both tires so the tread pattern is facing the same way, the scalloping is on the same edges of the same treads, I'll refrain from trying to say leading or trailing edge of tread because I always confuse myself looking at them). It's little triangle scallops but they are subtle (can't hear noise caused by them or feel it).
But anyway, my wear is even on both sides. I would only imagine wear like that based on turning left or right would be because of making a lot more left turns than right, I don't think that left turns being slightly wider/longer than right turns (in America) would make that much of a difference. I currently have almost 14,000 miles on my tires (Dunlop AE, rear is MT90-16 or 130/90-16 and front is MH90-21 or 80/90-21). You can't even really see the scalloping in the pics of the rear, you can see it a little on the front from where I rolled through cat litter and as you can see, they're subtle. For full accuracy, DL makes both tires in both sizes and these are currently MH90 front and 130/90 rear, even though MT and 130 is the "same width", there are some subtle differences between the two (MT has a 74 load rating and 130 has a 73 if I remember right, also one of them has a marginally wider overall width because it has slightly more sidewall bulge, but I can't remember exact details, though I have run both an MT and a 130 rear and they wore the same on my machine).
A side note, that rear tire is multi-compound (softer outsides, harder middle), but the front tire is not, that's according to Dunlop.
Anyway, book recommend PSI (stock tires would be Dunlop 402s) is 30 front and 36/40 (solo/2-up) rear. Dunlop recommends for AE for mine 30 front and 40 rear. For the life of these tires, I have run 32 in the front and 40 in the rear. First two shots are the rear, last is the front:
As you can also see, my rear is a little more squared off than yours. Pics make the tread look deeper than it is, I am .048" from hitting the wear indicator on the front and .080" on the rear.