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So what you have is a launcher that's clunky to deploy, which you have to be very careful to course correct (and only with very fine and smooth movements, or it'll waste all of its mid-air thrusters), you have to NOT flinch when it fires, and it basically requires you to get out in the open, without cover, and fire at an enemy tank, from within 1 kilometer, and you have to STAY out of cover and keep the missile in the air for 12 seconds, while the enemy tank hears that POW POW POW POW POW POW coming closer and closer.
Also if the target moves faster than the fine and short movements you're capable of practically making with course adjustment, you're very likely to not be able to hit.
US Marines did not like the M47, not just because it was very difficult to use, and demanded you to basically expose yourself to an enemy tank for 11 seconds longer than you'd ever want to, risking being blown up, but also because the system was very heavy and clunky. Select dudes in the squad would carry these missiles, which were heavy, as were the optics, and the funniest part is that the goddamn bipod legs would often accidentally deploy themselves when you carried them, which is great because that means the launcher will get stuck in shit, like vegetation, corners, or your squadmates.
I read an account of a soldier who carried them on training marches, and one time the bipod deployed and got stuck in a vine while he was walking, trying to just pull forward to get free, to just fold the bipod up later, he couldn't and was instead pulled and thrown backwards, landing with his face in a tree. Landing in that small three, a thin branch 'impaled' into his face, his eye. VERY luckily for him, the branch hadn't really pierced anything, and 'just' wedged itself into his eyesocket, underneath his eyeball, and the doc back on base could very carefully pull it out and then put him on sickleave, and he would be fine eventually. The story didn't endear him much to the Dragon.