I think that in practice, if the "world" ranking people don't change their rules to allow for LIV then I think the majors will simply start their own rankings or choose some other metric to decide who gets in to their tournaments so that they continue to get the best field.
Then I would suggest you don't understand the politics of golf at the highest levels very well.
I think a lot of people assume that the interests of the different organisations that form part of OWGR are exactly aligned. I'm not so sure. While I'm quite certain that they all would rather that LIV never happened and hope that it fails some time soon, they will also have different reasons for thinking that way and more importantly different aims and objectives.
For instance the PGA sees LIV as an outright competitor that's competing for players and competing for sponsors. Historically by being based in the largest golfing economy they have been able to outspend the competition and in doing so succeeded in poaching most of the best players from other tours. Now they are up against a competitor who seems to have more financial muscle than them, hence the different tactics like banning LIV players from playing in PGA Tour events and withholding ranking points. If they could they would have the R&A and the Masters ban LIV golfers also.
The R&A/Masters on the other hand maybe don't see LIV as a direct threat to their comps, although LIV could yet decide to schedule events directly against them, but I suspect they will be worried of their status being eroded by a reduction in top talent playing in the event. Think of the Open post WWI but pre-Palmer. The top guys who aren't exempt by having previously won a major probably have enough residual points from before they joined LIV for this year and therefore the R&A/Masters can probably afford to kick the can down the road for another year but at some point they are going to have to address the issue if LIV continues.
At that point I imagine the OWGR gets revamped to include LIV or its relevance as far as the majors are concerned diminishes. Bear in mind that the OWGR was originally thought up to assist the R&A with judging who should qualify for the Open.