Why is "growing" always the goal? Why not go on sustaining?
... and infinite growth is neither of those?
And yes, growing until that exit point is a lot of work - so it makes total sense people want an exit at some point.
Of course everybody expects the company to take advantage of opportunities - but it has to make economical sense. Nobody wants their company to try to grow so hard the whole company crashes.
We're talking about a nascent field. Sustaining means holding the status quo while others lap you in capability and cost.