Most of the appraisers, inspectors and attorneys are filling a compliance role.

The reality is the real estate person usually drives the process. Good ones know which appraisers to call and which inspectors to avoid. There's no real professional ethics involved, so most of them have arrangements with preferred folks whom they get referral fees from. (It's one of the reasons why home inspectors are almost completely useless.)

Real estate is ultimately a shady business that is about who you know.