You'll find earnestness in fields where the "system" is known, transparent, learnable, and verifiable. Musicians and mathematicians can't bullshit because other practitioners will catch on easily.

In real estates and startups, the "system" is usually esoteric, highly network dependent, and non-verifiable. You can't tell if a startup founder is truly a genius, or just lucked out (or had access to his dad's millions as seed funding).

Any field where knowledge remains locked away in closed networks essentially becomes the domain of bullshit.

Open knowledge breeds earnestness.

If everyone knew exactly how every real estate deal in the world was structured, there would be no bullshit real estate investors.