Autoland?
In answer to the questioin posed; yes, you can do an autoland with the A/Throttle inop.
As for the rest, where do you start?
How we get into slanging matches and these peurile; our SOPs are better than yours rubbish, I can't begin to understand.
There are limits (e.g. 10kts tailwind) and restrictions (Power supplies etc.) that apply to all aircraft, not all are the same restrictions.
I have done maybe a hundred autolands in 30 years and never had to use manual throttle control, nor have I ever done anything other than let the A/Throttle retard the levers and EVERY landing has been within the touch-down zone and perfectly acceptable as far as firmnes was concerned.
Let the designers design and let us fly. Being clever and retarding throttles at other than the designed height means you should (think you are) be a designer and let us pilots fly!