Once they reach the limit of demand, then there's nothing more to be made in that price category, so they get more by selling out and lowering quality and price.

We're going through massive global depopulation in the entire industrialized world. There are no new customers coming and sales will naturally trend down because of human extermination. Once everybody has an electric shaver, then you know that the next generation of customers is half the size or less. Unless you can make people grow their beards and hair faster, then there isn't going to be any demand among people who can afford a quality product. You have to start targeting the very poor, and thus lower production costs.

Or you could just be happy to have a profitable company that makes money consistently. Shavers don't last for ever and new people grow up every day. You could also just launch a new product line that's cheaper without compromising the existing ones.

But nooo we need infinite growth which is impossible so let's run the company into the ground for some more growth before our shit decisions catch up to us and stock price plummets.