>But why is tech framed the opposite of art?
You are fundamentally misunderstanding the issue. It's not tech vs. art. It's a "here's these people that make a lot of money and end up just being really big consumers" vs people that are the "creatives." The type that give a neighborhood flare.
Consider a programmer who perhaps love the "art" of programming and spends the majority of their time coding/tinkering without compensation (a rare prospect these days, admittedly), versus someone who works at a corporate job, does what they need to do, and goes home. Neither is better than the other, but they will end up creating radically different communities.
>Why is tech equal to techbro?
Because it's just the type of people it attracts these days. Name one neighborhood where a group of IT people came into that neighborhood and made it a creative space. Without fail, it just becomes a giant consumer hub with absurd rent prices. Artists tend to congregate in areas with other artists and areas that have cheap rent. Tech tends to drive up rent, and it certainly isn't an industry that attracts artists not centered around digital design.
>Or cryptocurrency?
The technology that did absolutely nothing, soaked up huge amount of raw resources, so techbros could play a game about who's going to be left holding the bag?
This is exactly why I used the term myopic. You might find it interesting and cool, and that's great! But it hasn't done anything for anyone else outside the tech sphere. In fact it's actually pretty easy to argue it's been a net-negative across the board.