Your entire post assumes the intelligence and foresight of a potato on the part of the buyer.
Get someone to install a decent charger at home: View it as part of the purchase price of the car, if one even needs it. Many can actually charge enough using a standard outlet, and in some areas the dryer and/or electric panel is right in the garage, so a bigger charger isn't hard. Most home chargers are just fancy cables anyways, the car's on board charger does the heavy lifting.
Drive to the office on lowish battery: Didn't plug it in the last 3 days or so, I guess?
Find out the office doesn't have a single charger: One would think one would know this before they bought the car. Alternatively, I know of people who bought an EV because their work not only has chargers, but they're free, so don't have to pay for gas or electricity.
Limp home: Alternatively, they can use an extension cord to a convenience outlet outside to get 30-40 miles over a 8 hour shift even if there aren't any dedicated EV charging outlets, or visit a fast charging station. Cost a bit more money, but that's like getting gas just outside an airport due to poor planning.
Replacing the battery: The official lifespan of an EV battery today is 8-15 years (and the 8 years is getting old). Seriously, it's like planning to replace the engine in an ICE car at this point. Does it happen to a percentage of vehicles? Yes, but most ICE vehicles never see a replacement engine. Neither will most EV cars.
Month to get a "shipment of batteries" - no, it is more like a week in most cases. Replacement is rare enough that yes, sourcing an OEM replacement can be tough at times, but I've also seen ICE vehicles grounded for months because of lack of parts.
In addition, replacing the battery is unlikely to be a "sudden" requirement. It'd be like elective surgery, schedulable.
Meanwhile, if one has one of the more common EV models, rebuilt batteries are more and more available.
And no, not every small shop will work on them, but a quick search showed 4 shops that explicitly work on EVs but are not dealers within 30 miles of me. Meanwhile, there's less need on average for work anyways. Your favorite shop can still probably work on the brakes, suspension, and such. Tire shops have zero concerns. Etc...