I don’t see much problem with this. Most Japanese people have a green tube of grated wasabi in their house. (https://www.sbfoods.co.jp/products/detail/16343.html)

There’s definitely filler (more than 50% is real)but I don’t think people care, especially the average busy wife trying to get dinner on the table every day.

Most of the time I’ve had real wasabi its at a super nice place, like eating kaiseki, and it’s presented as the root with a small shark skin grater.