The tech industry cheerleads the displacement and reconfiguration of huge institutions like the music industry and telecoms. The arms industry shares many of the attributes of those industries, and is poised for fundamental change that is much like the changes they have experienced. If the product of the arms industry were not arms, the inevitable upheaval would be anticipated and prophesied with glee by the usual pundits (this website included).
It’s not, because the general availability of weapons is not something we as a community can agree on as an unmitigated good. For that matter, even free speech and assembly are by no means goals universally agreed upon. But advances in technology are providing all of these things, regardless of the preferences of any one group.