I have seen studio photographers who use the most basic software which is designed for one purpose:  Basic retouch edits (and add things such as vignette) to quickly output  shots of families,
puppies, etc. of the basic studio clientele.   One such photographer I know of does pretty good work for the consumer market.

Others may use PhotographersEdit, a company who will take your photos and return edited and ready for the customer prints and albums, the studio needs only to shoot the images and cull out the really bad ones.  (This company also offers webinars on various subjects a studio/wedding photog might use, such as Lightroom.  I "attended" one and it was quite good.)

It is all in what you want...and how.