This is a really foolish thought process. Many of us are very frustrated with the lack of HD premiums with DirecTV. If you cannot see the value of having all 26 HBO/MAX channels in HD over just having the flagships and a DVR, you just don't get it. Nobody is going to change your mind. Many of us would jump ship in a heartbeat for premium channels.
I used this example before when somebody (maybe you) used your argument about the premium channels. When George Carlin died, HBO COMEDY aired a ton of George Carlin specials. These specials were not aired at all during that same month on the flagship HBO. So having a DVR and the flagship HBO does one no good if the content isn't aired during that month on that channel. There are plenty of examples of the multichannels not airing the same movies or series during the same month as the flagship. Additionally, sometimes people like to sit down and flip channels or pull up something that is on spontaneously with no planning. I have discovered hundreds of movies I would have otherwise never seen due to flipping. If you don't know a movie exists, you don't know to get it off Netflix, buy it, or DVR it when it airs on the flagship.
With the Internet, DVRs, and Netflix, there is as much need as ever for multichannels and we want them in HD. Multichannels are far from obsolete.