False fronts are one of the aspects of GCA that you have to consciously take into consideration - that is, you actually have to think and strategize. A false front makes the player think the green/target is bigger than it actually plays. Many greens have a very large surface area but with the ff they actually play quite small. To do well you have to clearly think about that - and having options and having to think about how to play a shot is one of my favorite aspects of architecture and playing.
I'm guessing it was a practical drainage matter at first, until archies realized the strategic value. Then they had a lot of fun with that as well as with the sides and backs of the greens. It puts a premium on accuracy for the approach shot and best of all gives the player different options to be creative in their greenside recovery shots. That is more clever and fun than just hacking out of deep rough or playing a pitch from a place dead level with a flat green. It think archies need to be careful with this though. It can be taken too far. For instance, most of the greens on Pinehurst #4 are very similar. I like a good or at least better place to miss a shot - and I like differing angles to play with on the greenside recovery. #4 is a rather extreme turtle back affair with most of the recovery pitches being very similar and very difficult. For me, there is some enjoyment to be had with that kind of challenge from time to time. But it can be done more cleverly.
Even to this day after playing the well designed 'beveled' type of greens for 30 years I have to think before I decide whether to play one of the loft shots, putt it, or bump and run it. Often there is no clear answer and I just go with my instincts. That is part of the fun.
Well, that's my amateur hour view of it. I don't really feel qualified to be on the same page with Doak and some others but I suppose there is a bit of value in hearing the views from those like myself who are not experts but play these courses and enjoy giving the designs more than a little consideration.