Let's dispel this "I'm anti-proxy to help FFG" charade.
FFG is not worried about people proxying upgrade cards, because those people are buying ships. If FFG thought upgrade card proxies were a threat to their sustainability they'd do something. They haven't. They're selling a ton of ships (which is what they care about) and they want to retain customer loyalty by keeping their customers happy. Note the U-turn on needing Scum Dials in Most Wanted.
FFG is a sizeable corporation in the business of turning a profit and is pretty good at it, they can look after themselves. They don't allow proxies in official tournaments because that'd be a major mixed message (they don't want to tell people not to buy their products), but do they care about what casual players do with their ships? No. For all they care you could make your own upgrade cards with different rules on them (they actually encourage it). They're in the business of selling plastic ships here. Their profitability does not hinge on people buying StarVipers just to get Autothrusters.
Being anti-proxy is not about FFG. It is about you.
It's pretty much "I spent circa £70 on six TIE defenders I don't want because I felt pressured to have six physical cards, now I'm going to pressure you to do the same so I don't feel like an idiot." It's the human need to pressure others to conform to them so they feel happier about their own choices.
Or, "I spent money on this game I enjoy because it's a quality product, I like the models and I realize that FFG didn't design and distribute this game out of the goodness of their hearts, and if I enjoy it, I should maybe contribute to FFG being able to continue producing it."