Again, you are confusing "right tool for the job" with your silly prejudices.
Take me for example, I know Stockhausen because I studied him in my fine arts undergraduate degree in Electroacoustic studies at university.
To recap, the question was somewhere along the lines of "how do you prototype music, I have a casio?" not "how do you write a serialist score for a chamber ensemble?"
Even then, The Linux Laptop Orchestra based in the music department at Virgina Tech uses trackers. Of course this isn't the score to Star Wars and a house in Malibu; it is very left field stuff, but it can't be denied that this is serious contemporary practice for anyone in the know.
Regards,