Why do we avoid build tools again? Webdevs comes up with the most arbitrary goals, I swear to God. Do you not run a script to deploy your software in whatever

Why do we avoid build tools again? Webdevs comes up with the most arbitrary goals, I swear to God. Do you not run a script to deploy your software in whatever way? If you do then what's the difference if the script builds some things as well and not just uploading?