C'mon, replacing the HDD isn't all that, lol! On the Unibody Macbook Pro's you remove a total of 12 screws. In total you remove two parts, the bottom of the laptop and the HDD "lock." In fact, it's easier to get to the HDD in the newer MBPs than the older ones and the older ones still weren't all that either. All it takes is a little precision. I think you only need a T6 for like two screws and one of those is pretty cheap. The battery has a pull tab (like the stock HDD) and is held down by 2-3 T-type screws so I'm assuming that it is indeed removable it just takes a little more effort than the older models.
Personally, I think an unskilled person has no business messing with any computer hardware unless they have a helping hand (be it a person on online resource) anyway. It's up to them whether they want to pay someone to do it or to figure it out themselves. I chose the latter.