Nope not too easy if you don't know how! Designing for print is totally different than designing for the web, where you can't do a lot wrong, and if you do, you just hit delete and start again.
With print design you could easily miss a bleed, or a trim, or not use CMYK colours- and then the printing will come back wrong, and you'd never know until you've spent hours on it and paid for it in advance!
I'm biased (obviously) but It's like everything, if you want a professional job you go to a professional.
Everyone owns a pair of scissors, but not everyone can cut their own hair