The fully-automatic question comes up because of pragmatism and practicality. The guy used 1000+ bullets to fire upon a crowd. You physically cannot do that if you only had semiautomatic.
I wonder if this might have been more deadly if he had fired fewer shots but deliberately aimed each of them at a person. The percentage of wounded survivors in that shooting was atypical.
https://en.wikipedia.org/wiki/2017_Las_Vegas_shooting
The fully-automatic question comes up because of pragmatism and practicality. The guy used 1000+ bullets to fire upon a crowd. You physically cannot do that if you only had semiautomatic.