Offtopic - Printer software bigger than Office 2007 - help...!?

Okay, so one of my partners asked me this the other day and I have absolutely no idea - how come the latest printer software for my snazzy (though cheapest in the range) printer has software that once you download all the bits to make it run properly is larger than Microsoft Office 2007? Why an earth do we need printer software that large?? - Help! 

Full screenshot here: https://blogs.technet.com/photos/mike_p/picture471151.aspx 

Promise to get back to HPC and Search posts tomorrow... :-)