Hi, I came across your posts because I am trying to find this out myself for certain, and the posts seem to be a lot of bias so I thought I'd share what I've found to be true.
Klaus Badelt uses Pro Tools, and almost all projects go through Pro Tools by the end, so to say that you know it's not Pro Tools is kinda silly considering it is the top dog for recording and anything you see on the screen has gone through it at some point (typically mixing).
For the most part, you're all wrong. The prevalent DAW for film game and TV composing is Digital Performer from MOTU. Not a software for beginners. However, many artists simply use DP to compose, and then everything is carted over to Pro Tools. My suspected reasoning is that DP has a way better interface for composing while Pro Tools is the industry standard for literally everything else. For example, Danny Elfman uses DP, but if you look at his interviews he's got a quite sophisticated Pro Tools HD rig in the back. Michael Giacchino also uses DP and mixes in Pro Tools, and so does Bear McCreary. Keep in mind that top composers wind up recording real orchestras, and there is nothing that can handle that better than a good Pro Tools HD rig.
My Music 67B teacher (Film, Game, and TV composition) insists that Logic also holds a large share in the market, but couldn't present one name in the top of the industry who uses Logic Pro. The feeling I get is that this is because Logic has a large share in the amateur market because it is a cheap alternative to other DAWs, but it fails to offer the stability or features that professionals need.
Hans Zimmer uses Cubase for composing, and insists that people in his studio use it as well. Many of the people who work in his studio and left are still using Cubase. If you watch Hans Zimmer's interviews, especially for his sample libraries, then you'll see he still uses Pro Tools HD for recording.
Keep in mind that you can use whatever you want to get the composition done (I use Sibelius and Pro Tools since they work well together due to both being developed by AVID) as long as at the end of the day you have your scores for your musicians and/or your MIDI files for yourself. The DAW just brings together all the recording and sample libraries. You should focus more on finding a process that works for you than mimicking what the pros do, and finding some good sample libraries.
Mind you, anyone who suggests that all DAWs do the same thing with a different workflow has obviously never extensively used one, and probably hasn't used at all more than two. To add to that, don't underestimate having a good workflow. You want your DAW to be a tool to get your work done, not an obstacle between yourself and the creative process. Personally, I've never been anything but happy using Pro Tools midi editor and Sibelius, but other people might feel differently and that is okay. Try different software to find the one that best fits your needs. Don't ever get married to the first DAW you use, otherwise I'd still be using Sonar. BTW, Sonar is generally the joke of the pro audio world (right next to Logic Pro). The only reason why sonar picked up so much steam in the first place is because of the Roland sound boards that exclusively worked with Sonar. Even then, most of the professionals carted the audio files to Pro Tools anyway. And keep in mind that Apple generally doesn't give things away for cheap. If apple is selling something for 200$, then don't go thinking it's equivalent to a 700$ software platform.