Where is your house located? It's not up to electic code in any country I've lived in.

Most electrical codes only require updates (to bring the system into compliance) when there is work being done. So if you don’t need to add a circuit, your home may still be wired as if it were the 1950s (or earlier!).

This is part of the hidden cost and complexity. For someone like the parent, you’d have to rewire an entire home. How long do you think that will take? If you seriously wanted to move an entire country over to electric heating, you’ll have all sorts of these edge cases. There simply isn’t a way to make a switch like that in a rapid manner.

The average home can use a water kettle and a gaming PC at the same time, you are making some super rare edge cases seem like the norm. I've seen lots of old buildings and none was wired so inadequately that you couldn't heat it electrically.

Yes, my home is wired from ancient times. Last year we had monthly blackouts in our home. It took multiple electricians to figure out that our home wasn’t wired to code, and finally to learn that two wires had melted together and were a fire hazard. It was easy to replace them but, impossible to rewire the house to bring it up to code. All the walls would have to be ripped out, which just isn’t feasible on a realistic budget.

The service coming in from the neighborhood is only rated for 25 amps too. They’ll have to lay new cable to get 50 amps and support a heat pump. There’s been some talk on the block about pooling money to pay for it, but nothing serious yet.

Anytime you’re talking about a large population, outliers are going to be found pretty often. Even if only 5% or the homes in Germany are like the parent/sibling post, that’s still 2.1M homes (Google said Germany has 42.5M homes, so that’s what I used).

So, even if the average home could be switched over easily (which, I still think is wrong), that’s still would leave a lot of people without many good, financially feasible, options.