I wouldn't say always. The last time I ran such a script, it didnt break anything. Granted, I did as the repo readme expressly and boldy stated, more than once, that 'anyone using this should read through the list of commands' (it was also nicely commented for lay people) and disable any sections related to services they use. Regardless, the defaults seemed quite sane and I even had to enable/uncomment a few for other services/products I didn't need.