That's not overplaying it, that's basically what you had to do to get the most out of FP-
If there are guests that cannot pre-pick FP+'s, then yes those ppl are disadvantaged. Resort guests can pre-pick. AP holders can pre-pick. So is it pretty much locals who will show up day-of, buy a ticket and go that can't pre-pick? Or off-siters buying tix thru a discount program like uctourist? That is going to be a very small fraction of the overall visitors.
I would hope the system would evolve to where all can pre-pick. But, honestly I wouldn't mind if the MB experience remained a resort-only perk. I stay in resorts. But to not look at what's best for me, I would hope Disney would leverage this in the way that would be most profitable to them as a corporation.
Are you a day-of type visitor? Just curious. I agree that's a downfall of the current system. I never said it is perfect. Just that one can / should try to find ways to make it work because it's not going away and saying you're never going to go to WDW again is just silly.
What 50%? Are you asserting that 50% of WDW guests are non-resort, non-AP holders one-day passers? I can't agree there. I don't have the numbers, but I'd guess resort guests are about 70%, AP holders staying offsite are about 20%, off-siters buying day-passes via uctourist or other sites are about 5%, and local day-passers are about 5%.
And, I would bet 95% of WDW's profit comes from the 70% resort guests. This is why every park is now bundling with resorts to offer resort experiences and trying to not just be a day-park.