I think compilations like this one are good for people who are just beginning to look into opera. If an interest is sparked by the beauty of this music, they might make an attempt to get into it more deeply, and eventually do all that you suggest must be done to truly appreciate the genre. Everybody has to start somewhere.
For some reason, I have never been able to get into DVDs of opera or other types of classical. Not sure why. Attending performances is another matter, but watching opera on a TV is not very compelling, with some exceptions.