If it's such an excellent choice, did your department mandate you carry something in .22 LR? I'm betting not. If you could choose your duty firearm, did you carry a .22? Bet not. There's not a single LE department in this country that issues .22s as a duty firearm.
The 22 LR is a favorite of hit men only on TV. When the so-called hit men do use it, it's because of the relatively low noise level and nothing more. The only worse SD round than a .22 LR is a .25 ACP.
Advice like your's will get some ignorant homeowner killed.
Really, and what's your background? Have you ever investigated a homicide scene? Ofcouse no PD would ever issue a 22 but I know several officers who carried 22s as backups and as off duty firearms. What I recommend to anyone for home defense is to utilize what you shoot well and are comfortable with, if it's a 22 so be it. You go on to say that the 22 LR is a favorite of hit men only on TV, I'd say those TV shows reflect that accurately. I respectfully disagree with you.