WHat is so expensive? Cost of labour? Cost of the part? If you literally have to take apart most of the car, than can end with hundreds of human-hours of labour and depending on the price per hour, can get very very expensive.
On the other hand, I agree that parts costs should be regulated, where a sum of all parts should not exceed eg. 3x the cost of a new car (some overhead is of course needed in selling separate parts). But we don't know that either.
FYI, many repairs require taking apart most of the car. For example, replacing gaskets requires taking apart the entire engine. And yet, garages aren't charging 100,000 euros to do so. More like 500 to 1000
It's possible you just have poor taste. Personally, I think the reasons for the repair cost aren't relevant, same is pretty obvious. It's an unconventional car that had limited production. I'm sure they're adding in the cost of parts (they'll likely have to buy another insurance of this car to rip the parts out of, or they'll have to fabricate it themselves. Which could require hiring an engineer to make sure they don't get sued if the car bursts into flames) and labor that comes with learning how to repair a complete unknown for them, plus a good helping of uncertainty.
The most relevant part of this story is that there's a guy who bought into a new tech, and who is being unreasonable when it didn't work for as long as he had hoped. And that comes through fine in the article.