The largest stock investors are institutional investors managing funds on behalf of retirement plans. Those investors tend to prefer consistent long term growth over a narrow quarterly growth target, and will actually look at things beyond just stock price, like strategy and long term market prospects.

Based on what evidence? They just make sure the line steadily goes up each quarter, instead of accounting for companies that invest potential profits into longer-term plans. If not, the 401K investor will either drop the stock, or put it in a higher-risk plan.

That sort of thinking is akin to corporate suicide when in a publicly-traded market, so they don't do it.

A company like Valve isn't publicly-traded, and they have a limited number of investors they can talk to about their plans. That and they have a reputation of quality products, so even the investors are going to put up with short-term drops in profitability for even more profits.