You absolutely can buy AEDs for home use, and if you're high-risk it might even be a good idea.
The only reason it's not recommended more widely is cost (they also need regular maintenance) and likelihood of actually needing it making it a poor medical value for the general population.
(This is also predicated on having people around who are trained to use the AED. If you life alone or your family/roommates don't know how how to use it, it's useless.)
I thought the whole point was that you don’t need training? Most of them literally talk you through and and all the administration is computer controlled.
You don't strictly need training to use it, but training is still strongly recommended if you want to know how to use one effectively and have the best chance of survival.
At a minimum, you need to know how to perform CPR in between shocks (or if you don't have a shockable rhythm). Ideally, you should know how to perform good CPR. The higher end ones will coach you on performing CPR, but that's definitely not universal.
Not to mention you need to figure out pad placement, possibly shave someone's chest (if they're excessively hairy), and delegate calling 911 to someone.
When seconds count you don't want to be spending minutes figuring all this out.
SBA.gov blog > Review Your Workplace Safety Policies:
> Also, consider offering training for CPR to employees. Be sure to have an automatic external defibrillator (AED) on site and have employees trained on how to use it. The American Red Cross and various other organizations offer free or low-cost training.
The only reason it's not recommended more widely is cost (they also need regular maintenance) and likelihood of actually needing it making it a poor medical value for the general population.
(This is also predicated on having people around who are trained to use the AED. If you life alone or your family/roommates don't know how how to use it, it's useless.)