When it come to making music, absolutely - for professional grade content one would need to use proper tools. I'm barely an amateur and while I enjoy recording my songs and adding to them with garage band, I'm more interested in spending my precious free time doodling with sound than trying to make a living with it. It's better than watching commercials on network tv. Professional do use it for creating though: one example is this - http://www.wired.co.uk/news/archive/2013-04/22/trent-reznor-... but there are other pros whom are turning to devices as a way to extend their creativity and enhance their performances. So, I believe that we are not far away from a device powerful enough to record, generate and mix professional quality sound for a fraction of what a recording studio of similar quality cost.
I do think I understand your position and you are likely correct. However there is this anecedal observation I have: people of my parents generation, when they use a smart phone; tablet or computer are very likely to consume with either email, web surfing or one variant of the addicting games that are free. However, being overly optimistic and observing my daughter and her peers as they grow up with device first and computer second I hope/believe/think (not sure if any of those words are correct but they are close) that they will have little choice but to learn to use it as the tool it is and push that to its limits and then extend it for their own purposes.
For the record, while I am an apple customer I'm under no illusion that their products are better or more successful than the other consumer electronics makers out there. It works for me and mine and that's why I stay with it. When it doesn't any more and I need to move on to something else, I'm glad there are robust ecosystems out there I can explore.