DC Fan wrote in post #16635238
There are many reasons to use monolights. Monolights (along with power pack and head strobes) have much quicker refresh speeds than battery -powered flashes.
Also, monolights' added power makes them more suitable for use with diffusers such as umbrellas and softboxes. Of course, its fairly uncommon for a studio strobe to be used as a bare light source. Typically, a powerful light will be combined with a light modifier of some sort.
Its fairly common for a studio light of some sort to be used as the photographer intends. While I am a vocal proponent of a large soft box, by no measure, is the use of diffusers standard in any way. You would be surprised at the lovely light that comes off of a bare head. So it is common to use a bare head. When shooting on location, anything goes, however I have seen both the elinchrom 74 octabank and bare heads being used, interestingly enough with very similar results.
DC Fan wrote in post #16635238
Then, the more powerful the light, the smaller the potential aperture, which can be a significant factor in some photography. There are many cases where the increased apparent depth of field of a small aperture is useful.
We should be aware of our surroundings - a lot of photographers rely on the ability to blur out a bad background. Come on guys, composition composition composition!
Personally I love shooting at small apertures and really pumping the lights. But that is just me
DC Fan wrote in post #16635238
Plus, added power and increased illumination allows the use of a low ISO. Powerful studio lights have been popular going back to the days when studio photography used ISO 25 or ISO 50 transparency film.
Studio cameras have low ISO's too, you know
Moreover, large lights setups and location shooting just require a lot of power.
DC Fan wrote in post #16635238
As a newcomer to photography, you clearly have much to learn. Experience will eventually show you that there is a very good reason for all equipment and techniques. It's best to be constantly willing to learn why things work the way they do, without as many doubts. Countless photographers have already tried things that a newcomer can't imagine yet.
Lets just remember that at one point or another, we were all beginners too. 