I think this is one of the more irksome things I see posted on these boards (not just by you). While it's 100% true, I think it's insensitive to the budgeting and planning process that goes into a DVC vacation.
People have limited points budgets.
At RIV, missing out on a SV/RV Deluxe Studio at 11m means either shortening the trip by 20% for a PV Studio, or by 50% for a SV/RV 1BR. Depending on the original planned trip length, it could be shortened even more (e.g., if originally planning 6 nights, it might mean only having the budget for 4 nights in a PV). Those are material changes to vacation plans, and not in a good way.
Rooms that can only be booked for a few seconds or minutes at exactly the right time, or not at all, lead to walking next time. People don't want to leave their vacation plans to chance.
I'm with
@T00dles on this, resale owners have a narrower range of alternative options, increasing the likelihood of resorting to walking. Doesn't mean every resale owner will, though.