This is absolute worst case scenario. We just sold in June, this was our experience:
1) We did not decline a single showing, but ~90% of them were either weekday after 4pm, or on a weekend = no time off.
2) Inspector & appraiser did not require us to be home. For anyone with a digital doorknob, or garage keypad = no time off.
3) Our realtor gave us next to zero feedback (said even when he regularly follows up with realtors, they rarely provide any). The little feedback we did receive was about things we would never change anyway, so feedback was worthless.
4) You do not need to open a bank account to hold a $500 deposit check. If a buyer really wants to be stringent on that, you can hire a 3rd party for well under $10k.
You're over-exaggerating big time.
You used a realtor, therefore your house was in the MLS. Appraisers and inspectors are part of the MLS therefore have access to your lockbox when using a realtor. Every time the lockbox is accessed by someone, it registers with the realtor can see who entered the house.
The post was about doing a FSBO and not using a realtor which is not on the MLS, therefore realtors, appraisers and inspectors would have to have the owner give them access to the house because the seller wouldn't have a lockbox.