Yes, sure. I've mined, and even mined for a bit at an occasional loss after hitting punitive over-baseline electric rates).
But it's farfetched to predict that everyone who was willing to do something when the bitcoin reward was X will still be willing to do it, in the exact same amount, when the reward is reduced to X/2. (Even if the goal is 'anonymous bitcoins' at above-market rates, they've still become twice as costly.) Demand curves slope down, supply curves slope up, exceptions are rare and not in evidence here.
But it's farfetched to predict that everyone who was willing to do something when the bitcoin reward was X will still be willing to do it, in the exact same amount, when the reward is reduced to X/2. (Even if the goal is 'anonymous bitcoins' at above-market rates, they've still become twice as costly.) Demand curves slope down, supply curves slope up, exceptions are rare and not in evidence here.