No it's not. Apple already IS a true competitor in the Audio market in EVERYONE's mind. Dear Lord they changed the entire industry and drove the record companies into the dirt with iPod/iTunes. EVERYONE associates Apple with music.
You are arguing for triumph of marketing over quality. Is Apple trying to be the next Samsung? I'll pass on that.
Sorry, but you seem to be missing the point. I'm not arguing marketing over quality at all. Where did I say that? I know that it is fashionable to think marketing is bad and product quality is most important, but people that think that are grossly misunderstanding how a business like Apple (or any other for that matter) works.
Sure Apple could very well design their own headset and do it quickly. But Beats is currently the headphone brand that matters and Apple does not have brand credibility in that market. That means that it will take time before Apple would grow in that market to become a viable competitor and it will cost them hundreds of millions in marketing to achieve that.
An understanding of market dynamics is important to see why acquisition is better than self-production in this case. The headphone market is maturing or already mature. It is still growing, but most innovations are incremental (connectivity through NFC / BT, Noise cancelling).
A lot of players produce headphones but fail to establish large market shares. Look at Sennheiser which has products in all categories and price classes, but fails to make a dent into Bose and Beat's market shares. The excellent B&O headphones are not much more expensive than the top of the line Beats and yet they fail to become truly relevant in the market. What this all means is that even with good products and marketing it is difficult to establish a market presence that will add significant revenue to the bottom line (talking from a business point of view here, not what the customer wants).
So businesses of the magnitude of Apple will engage in strategic acquisitions to grow in mature markets. It is the only way to become relevant quickly and to earn large amounts of money. I just learned that Samsung will introduce a new headset. We can talk again in 3 years and discuss how well they have done. Their headset (never mind how good it is) is confined to the fringes of the market.
I'm sure you will come back with "what about the iPad and iPhone etc". These were also mature markets where Apple entered with a disruptive innovation. Totally different situation where a completely new product can very quickly take over the market. Unless Apple thinks of something really different in terms of headphones, this will not happen when they make their headphones themselves.
Overall this looks to be a good acquisition:
-A well performing music streaming business with the possibility of taking some new contracts and technology with it.
-The best performing headphone business in the market. A complementary product line to Apple's current product line.