Because there are more free satellite channels available of excellent programming than I have hours in the day to watch....
Even if the 3.7-3.9GHz range is used for terrestrial distribution, the remaining spectrum provides bandwidth for hundreds of more channels that were available during the peak of C-band viewers.
The sky is not falling...
The loss of 3.7-3.9GHz will mean a tightened up of the channels, but there are also a few slots available where new satellites (if someone wants to incur the expense to launch them). For example, looking at LyngSat, old slots (if still available) like 72,79, 83, 85, and 95 are available.
Of course, that is assuming that mobile "theft" (as I call it) of the C Band spectrum will be sated by the above spectrum. Unfortunately, I doubt they are done trying to get more of it. Reminds me of the "theft" of OTA frequencies to now where OTA is in a real crunch compared to before. Since the mobile companies seem to rule the roost at the FCC, the sky may not be falling, but I can definitely see a few cracks! LOL!
Anyhow, to answer navychop's question,I think the hobby is more restrictive or limited than it use to be. C Band offers the best as far as entertainment channels, but has a greater learning curve, as well as set-up issues (size of dish, location restrictions, including size of property), etc. than Ku band. However, Ku band doesn't have the entertainment channels (other than PBS, Cozi, NBC, etc.) that C band has. So for a newbie wanting to enter FTA (not for feeds) then things are not as easy as they were to get entertainment channels, and really requires a greater commitment to the obsession... I mean, hobby, of FTA!