Here's my $.02. Apple is intending the MBP for consumers, people who will use the computer at home, school or what not. I consider a professional as someone who's using it for work, such as a photographer, or scientist. Those needs are such that they may want a computer that is designed differently or having features that fit their needs differently then a consumer who's looking to update his facebook page from his couch.
I really can't see your point. I'm a scientist and I don't believe that there is a computer that fits my needs better than a MBP. With it, I get: 1. Great display which is perfect for reading/writing papers and code, 2. Best keyboard and trackpad on the market, which is again great for writing papers, 3. Best-performing mobile CPU and decent (albeit mediocre) GPU which is great for times I need that numerical Oompf, 4. Enterprise-class storage performance, which saves me tons of time when working with data, 5. Enterprise-class connectivity via thunderbolt for quick backups and data transfers, 6. Very fast wifi card, which makes Ethernet unnecessary in most cases, 7. Essentially a full day of battery, which is great for teaching and conference trips, 8. Advanced OS options such as scriptability, backup, automation and diagnostics tools, 9. Fully certified unix OS with full support of a plethora of open-source tools as well as superior development capabilities... this is just what comes to the top of my mind. Of course, all of that in a laptop that weights just under 2kg, so I can easily carry it around in a light shoulderbag.
Overall, I see no indication that Apple is ignoring the professional, advanced user. Quite on contrary, a lot of features such as improvement in automation facilities, diagnostics tools, Hidpi support, new APIs and development tools, and the new colorspace and wise gamut support targets and benefits the advanced user first and foremost. In contrast to what you say, I am convinced that Apple tries to design a no-nonsense computer line that would cover as many use cases as possible, without Going into extreme niche cases (military-grade robustness, mobile rendering platform, extreme gaming etc,). Apple notebooks are targeted at both casual facebook users and serious data-crunchers/designers/scientists/etc. and caters to the needs of both the casual and the pro group.