Crown Recement; Why Dr. did not clean/wash/disinfect/dry my tooth before placing a crown on it permanently?

If you have concerns, you can call to ask the doctor/assistant what type of cement was used. Many cements are now very simple to use and don't require a lot of steps. Most cements need to be in a dry field, so if they had cotton in your mouth it would dry enough to get permanently cemented. Crowns can, and do debond for various reasons. One of the biggest culprits is sticky, chewy foods. 

As a rule, I now place the crown in an
antibacterial solution prior to re-cementation.
For many years, this was not a routine practice and I never had any
adverse effects. So, I do not expect you to have any problems whatsoever with
the tooth or crown.

It is possible/likely that there was no reason or need for what you describe. Some cements are fully retentive without many steps. Some have a long list of steps to work. Trust your dentist.