通过节点脚本或命令行Browserify uglify？

It seems in many places the professionals are building their projects using a node.js script that involves either gulp or grunt. What I can't figure out though, is why the script method is preferrable? When switching from the command line version to the script version, you add other packages in: i.e. gulp-uglify, vinyl-source-stream and vinyl-buffer. Wouldn't it be safer long-term-wise to use a method with the least amount of dependencies? Take for example the following command line method which I am currently using:It seems in many places the professionals are b