Also we’ve seen recently in the US you are liable to get killed for randomly going up to someone’s house.

The local blacksmith is still relying on the kindness of strangers thing. They have to make the business decision of what they need to run their business versus what margin of extra they have on hand. That's a transaction with a lot of complexity and I can't imagine the conversations were all as pleasant as you seem to expect.

On the other hand, I've had the "I noticed an external outlet near my parking spot, do you mind if I plug my car into it while I shop/stay at this hotel/eat at this restaurant?" conversation plenty of times and there's no "challenge" to it nor "transaction". The most common answer I've got has been "I don't see why not" because it's not really a transaction for most businesses, whatever extra they spend on electricity they easily make back in making a new customer or keeping an existing customer happy. In a few times I got back "there's a Level 2 charger hidden at the Library across the street and the fees support our local library" or "we have a deal with this parking garage a block away that has chargers and we can validate your parking for you when you get back", which just goes to show how normalized it already can often be as just another "parking consideration" of "where to park" when you ask businesses about it. Most businesses are used to answering "is there a good place to park?" questions. Parking is normal operations for a business, not "relying on the kindness of strangers". Electricity is "just" an amenity of parking, already in some businesses' minds. (Not enough businesses yet, sure, but more than you might think.)

To be fair, I've never been in a "life or death" situation where a "No" would have been some terrible catastrophe, but I've also never known anyone in my lifetime that had to buy gasoline from a small town Blacksmith or Pharmacist either.