Wrong and right at the same time. The early Mk1 version of the factory R3 bars were similar in appearance to the ones on Amazon and did bend and flex badly. The flat top mount plate was too thin so they redesigned with the very strong forged double wall mount in your photo created by squashing the pipe end walls together and drilling it.
These Amazon ones have a MUCH thicker flat plate in the original design and they do not flex like the Triumph ones did. They were/are sold out of Texas on eBay as well.