Wall Street doesn’t care about democracy, it cares about funneling money to a small amount of people. They can do it in a democracy, but to say that they couldn’t also do it in an oligarchy they participate in is I think opposite what would actually happen.
I loosely agree with that in principle, but modern Republicans like the House Freedom Caucus are not the kinds of oligarchs Wall Street would want. They're motivated by raw resentment, anger, and a desire to hurt their perceived enemies, not profit. Wall Street doesn't care at all about "wokeness"; if that's what customers want, they'll gladly provide it, whereas you're increasingly seeing Republicans attack large corporations for not matching their own specific narrow ideology (see, the DeSantis v. Disney fight).
My point isn't that Wall Street is good - only that they're reliable and predictable. In a perfect world, I'd absolutely want to see a strong national ISP akin to the USPS that's completely isolated from political bullshit. In the current political climate though, I'm very concerned for the ability of our institutions to actually remain isolated from political pressures, which could be extremely strong given the power at stake. Pending SCOTUS cases have the potential to rip open a giant hole in the administrative state's ability to maintain some level of independence from the executive, for instance.
To be clear, I'm not saying you're really wrong, and I completely understand your position. I just don't think I'm quite as optimistic, or perhaps alternatively, I'm a bit more paranoid.