Many investors care more about growth than capital efficiency. The investors in the last round of your startup typically have a 1x liquidation preference as well as protection against down rounds. For a company that's generating revenue this provides with protection in case things go wrong. They also have a portfolio. End result is that many investors are more risk tolerant than founders and will push for growth at all cost.

To be clear, here at Stream we have super supportive investors. But I've seen friends of mine struggling with their investors and the constant push for growth at all cost.