How will that prove your point? Is your point that the Thunder are worse without Westbrook than they are with him? Because I'm pretty sure 100% of people agree with you on that.
We've really never seen Durant miss significant time and Westbrook left on his own. When Durant did miss 5 games or so a few seasons ago both James Harden & Jeff Green were still on the team. Whether the Thunder "struggle" or not for these next 6 weeks without Westbrook won't prove anything you said as we've never seen the Thunder play with just Westbrook.
Looks like we'll wait until the day Durant goes down then I guess. Idc, I'm pretty sure on this point, more than most points because it makes sense from a basketball perspective than a team without a play maker would be worse off than a team without it's main scorer. It's easier to make up for scoring than it is play making.