Well, its also that the target company already has a working and functional foundation, and possibly product, and has already gone through the effort of finding

Well, its also that the target company already has a working and functional foundation, and possibly product, and has already gone through the effort of finding experts in the area, and have a bunch of employees trained to work on the system. The choice is something like $5M acquisition or $1M building it + 2 years For a large corporation, it makes sense that money is cheaper than time