Yes, there are many factors.

We don’t appear to need an additional vaccine anyway.

There are some smaller sites, such as pharmacy chains and independent ones, too. I know there are provisions for elderly and disabled confined to their homes - they were in the first group to be Vaccinated.

I don’t know of anyone vaccinated at home.  I think everyone who wants a vaccine should get one as soon as possible, at any age.  That should be the goal. Then when they see how many are not vaccinated, they can decide what to do from that point. I realize a percentage will refuse vaccines which is their right.  We’ve seen those posts here. But to get herd immunity and be safe for everyone else, there must be a minimum. 

I’m sure a lot of ppl are vaccinated at home if they are disabled or homebound rather than living in a nursing home or assisted living. They would have family and/ or home health care 24/7

That is a compassionate way to distribute it, but here they must travel to a site.

Too many unknowns still.

I heard that millions of shots (and other medical supplies) are stuck aboard ships trapped behind that one container run aground sideways in the Suez Canal.

I haven't heard that specifically stated on any news site I frequent, I'd suggest those supplies are flying in rather than coming across by boat. 

I can’t find anything about the contents of containers on that ship.