Not according to what Zane says.
Aesthetics is definitely something you can work towards.
You shouldn't buy into the notion that aesthetics is for 'lighter' guys. That's a misnomer spread by guys who are too proud to control how they look.
Whatever was a guy's selling point is what they always supposedly worked for. It's just ridiculous of course. The big brutal guys worked for that. The lighter so-called aesthetic guys worked for this instead. Also notice how bodybuilders always site guys who look like themselves as their inspirations and how they worked to look like their idols? Fact of the matter is that genetics is what dictates if you're going to look aesthetic or blocky. It's not a training trick. Mike Katz could never look like Zane, he could do Zane's routine exactly and it wouldn't work. And Zane couldn't look like Katz. Could Platz have been proportionate and symmetrical? No, he tried and failed. Could Arnold have Platz's quads? No.
All a bb can do is add muscle to his frame. Proportions and skeletal structure is what determines aesthetic appeal and it's all genetic. Take ANY bodybuilder at the start of their competitive career and compare to the end, when they no doubt tried balancing out their bodyparts and you'll just see a bigger version of the starting point. Training has little to nothing to do with it.
No, aesthetics isn't just for lighter guys, that's absolutely right. But lighter guys are always called aesthetic by bodybuilding fans, magazines, etc. Being light isn't necessarily aesthetic.
Like I said, the only thing you can do is avoid ruining your aesthetics with drugs and food and Synthol etc.