[cygx]

I don't understand why quantum theorists don't take pilot wave theory and the oil droplet experiments more seriously.

This goes back to Einstein, whose main beef with QM actually wasn't indeterminism. Instead, determinism was supposed to be a means to restore locality. Bell's theorem tells us this is doomed to fail, and indeed Bohmian mechanics restores determinism only at the cost of locality.

Even though experiments with walking droplets are an impressive demonstration that wave-particle duality isn't necessarily something mysterious, they don't help to address the issues at the heart QM.