Is this specific to software? Do you believe any patents should be allowed to exist? Anything I can create must necessarily be a logical product of smaller building blocks.
Should Carl Benz not have been granted a patent for the motor-car? Engines, wheels, and seats were not new.
Doing things "with a computer" should not be patent-able. The computer already has the inherent capability to do everything anyone could ever conceive of instructing it to do, because of mathematics.
Constructing new capabilities for a computer, or a novel physical device to interface with the computer to extend its capabilities, should be patent-able.
IMO, in what I see of this patent, the computer used is not novel, the wireless signal utilized to transmit data is not novel, nor are the cameras that communicate with the computer novel. Nothing of value was built.
Law evolves over decades or centuries. Computer related patents are very new to the scene (in law years). They are getting better but there are still some clunkers out there.
In other more mature industries like medical devices, autos (auto parts really), kitchen gadgets, fasteners, packaging, HVAC, etc., the patent litigation (including trolls) is fierce too and has been for decades.
Probably not. Government granted monopolies only make sense when there are government forced delays as in drug approval. And even there, there are a lot of problematic cases.
In addition to banning software patents, a positive step could be to prove that developing the patent required substantial investment and would not be feasible without the patent -- as is the case with (current) drug development and laws. That would at least raise the bar and burden of proof of social benefit to the one filing.
Should Carl Benz not have been granted a patent for the motor-car? Engines, wheels, and seats were not new.