On top of that people are already spending thousands of dollars on ebikes- this really isn't that much more expensive than a much shittier version. The "best ebike" according to Wired last year is the exact same price as this one but weighs five pounds more.
[1]: https://www.lookcycle.com/us-en/products/bikes/e-bike/road/e...
The 1-2 kg weight savings is useful if you need to carry your bike up the stairs to your top floor apartment. Or to ride it up hills in manual mode. Both of those seem like niche cases.
Edit: other responses tell me that modern carbon fibre frames are not much more expensive than metal, not much more fragile, and may be more comfortable. That makes it a more reasonable choice than I thought.
These don't really seem niche. The lighter the better, simply because F = ma, the lower the mass, the higher the acceleration from the same amount of force from the battery applied. Or, higher range.
It isn't just about carrying it up the stairs to your apartment, it is the stairs taking the subway and getting off, getting on and off buses, going up and down stairs for parking garages when you get where you are going, the battery lasting a little longer overall, taking hills and accelerating a little faster. Especially for someone who is not a typical fit cyclist, the weight difference can be a the difference between this and not cycling at all.
For relatively short trips, mixing with public transit an electric kick scooter is a competitive option, cheaper, comparable weight or lighter. Slower and less utility though