TOH, NYW, vs. what my wife wants to watch vs. what my son likes to watch. Or you are too tired to catch the night time news but there is a segment that you wanted to hear about. Or a movie comes on at 3:00 AM.
The beauty to being able to record is that if something does come on that you want to watch is that you watch it when it is convenient for "you" to watch, not the time that the network thinks is the best time for you to watch it. We no longer have to be in front of the TV to watch anything at any specific time and can record up to 200 hrs of regular and or up to 50 hours of HD TV.
We could literally not watch TV for several weeks and not miss seeing anything. We watch TV and what we want when it suits us.
Not using the recorder means you have to wait for commercials and being a submissive to the networks if you want to watch what they are broadcasting. With out the recorder you "do" have to work around all of the Vast Wasteland to view a particular broadcast here and there. With a recorder you probably watch less TV because you only turn it on when you have time to watch it and you are only watching exactly what you intend to watch.
You have to really try it to understand the efficiency. I know 4 or 5 people that pretty much made the same comments that you did. They said we don't watch much TV we don't need it. I explained, you don't watch much TV because the shows you want to watch are not on when you want to watch. When you learn that you have total access regardless of broadcast time or channel to the 10% of worth while viewing, you look at the multi channel recorder a bit differently. They now have the recorders and wonder how they ever did with out them. They spend less time in front of the TV but see more of what they want.
The beauty of a DVR is that it will search typically 2 weeks in advance for content that you are interested in . You search by show name, persons name, type programming, time or day. Additionally it will remember your preferences and automatically record them regardless of day or time, automatically changes if the show is moved to another day or time. And it will not record repeats if you don't want it to do so, so my DVR only records NYW about 15 times a year and If I choose to do so I can watch the entire season in 1 day.