I have talked with Bridgelux's engineers about this and was told it had more to do with inconsistent output of light between COBs. As long as we have enough COBs on a driver for more than one to fail without over powering the rest, we should be fine. Every light I have bought from China with Meanwell drivers has been run in parallel. I have run multiple setups in parallel with no problems. The engineer said that there shouldn't be any fire safety issues with this setup the way we run our panels. What I mean is, if your can safely run your panel with one of your COBs disconnected, the whole panel won't fail. Now if you are running, let's say, a HLG 600 with only 6 COBs and one fails, now you are pushing the limits of the COB, I can see thermal runaway happen. But if you run 10 on the same driver, you could loss 4 COBs before you system is in trouble. For those that are still paranoid, you could check forward voltage and remove any COB that is running at a voltage with to much difference. I have done this with both Vero 29s and China's Bridgelux version COB. The voltage difference was within .03volts, so I no longer bother checking.
Please feel free to call Cree, explain how we run are panels (soft with overkill on cooling) and see if they have any concerns as far as safety. I personally don't care if one COB is putting out a couple of lumens less or more. I still like using CC/CV drivers for the simplicity. Pick a wattage you want and add COBs until it's safe.