Thanos was caught off-guard. first, the planet had been essentially destroyed. We have to assume Thanos would be surprised by this. Second, Ultron was ready and given he's AI processed the info, Thanos and the stones extremely fast. Seems plausible given how fast a super computer can process information. So he did what Ultron would do. Size up the situation in milliseconds and take decisive action. Thanos is a living being and while very smart and holding the stones, may take a second longer to react to the laser and block it.rhutton125 said:
I kinda have a problem with 5-stone Thanos getting one-shotted by (essentially) Vision. If it was that easy then they should have won IW, just distract him for 3 seconds and then cut in half…
In IW, Vision (who was severely injured already) wasn't standing (floating) there waiting for Thanos to arrive in Wakanda. The Avengers were trying to keep Vis away from Thanos and his army and so when he arrived, Wanda was with Vis about to destroy the mind stone. Vision's main concern was eliminating the stone from the scene. In hindsight, it was the wrong decision as their best chance was for Vis to fire the laser as Thanos was distracted fighting the other Avengers. By the time Thanos was in range of Vis, Vis was already dead and the stone was destroyed. Thanos used the time stone to reanimate Vis but immediately grabbed and and ripped the stone out of his head. Vision wasn't ready for that. Also in hindsight, learning what the stones really can do would have been huge. The Avengers do learn this more in EG before going back in time. But unfortunately they didn't have time to learn about the powers of each stone. I am not sure if Strange, Wong and the sorcerers knew the details of each stone either but I figure they have the information somewhere in their library.
