I haven't read the rules in their entirety but what I have read is laced with ambiguity. Even when I read articles discussing the rules, they often cite the ambiguous nature of the rules and rule enforcement. This is why I didn't just dismiss the question in my own mind as "against the rules". It's against the rules to drive past the posted speed limit but drive on any interstate, highway, freeway or city road and tell me that this rule is adhered to.I guess we can start with It's against the Rules.
Probably we could end there. But the other factor is the allegation that commercial renters invariably hoard huge numbers of high-demand rooms, presumably using bots and long periods of reservation walking to maximize their efficiency in obtaining those rooms. Thus the perception is that commercial renters are bad for the average member.
As for the other reasons you cited, I'm not sure I'd agree with that assessment. Granted we haven't owned DVC long enough for a historical pattern but the points would be owned by someone, if not the commercial renter. Those individuals would be seeking reservations and so the points would still be used. It seems to me like a 6 to 1 , half dozen to the other scenario. A percentage of the same people that rent might then buy DVC and seek out the same reservations previously acquired from a commercial owner. Nothing is being avoided in this scenario. As for bots, one could suggest that anyone, the casual renter and the commercial one both can employ such measures.
Time till tell if it changes things or improves them for the owner that books for themselves.