Game theory says that bluffs aren't to make money in the long run, they are supposed to be break even. As your bluff will usually not get through every time.
Value bets is what makes you win. They drive your value.
So I'd go with 'No' on your question.
In theory bluffs are profitable, if you can find spots, where people overfold. However in micro and low stakes online games such spots are rare especially against recreational players. If someone put up $5 to have some fun, they are typically not interested in making big folds. So in general bluffing is not very important in online micro and low stakes games, and definitely not nearly as important as getting max value from your good hands. Or for that matter being good at snapping off other players bluffs while getting away cheaply, when you are beat.
However if you never bluff, and your opponents catch on to this, then they can exploit you by never calling, unless they beat some of your value bets. So in theory the purpose of bluffing is to force people to regularly call you with bluffcatchers. And if you play against the same people all the time, typically in cash games or SnGs, then you probably should throw in some more bluffs against the regs to avoid getting exploited.
Finally its important to say, that flop and turn bets are rarely pure bluffs, since we usually have at least some
equity when called. And if we are C-betting with A high, we sometimes have the best hand, if our opponent missed as well, and we can even get called by worse, if they are drawing or floating. So the classic flop C-bet in particular is not really a bluff most of the time.
