Yes, buying Windows laptop and Android tablets IS confusing, and many people find it very difficult to pick the one that is right for them.
We Americans love a binary decision - "two party system," winner/loser, white hat/black hat, etc. But we don't really live in a binary world.
There are far more Windows laptops and Android tablets to choose from because there is more than one company selling Windows laptops and Android tablets. Each is competing against the other, each product line head-to-head-to-head with similar product lines from the competition (including Apple). Apple positions itself as a single alternative to all those other companies, but that, too, is a form of competition. Apple, as all the rest, must consider consumer interest in particular product configurations, regardless of which manufacturer introduced them, or which OS they happen to run.
Even among OSes, it's not really the binary world painted here. Is there not Linux, Unix, Windows 10 Mobile, Blackberry, Tizen...
Ultimately, what is confusing is our capitalist system, wherein anyone who wishes can open a company and go into competition with the existing companies. They can design their mousetraps and see if the world beats a path to their door. Simplification arises when particular products or companies fail to be profitable (or sufficiently profitable). When there's a lot of money to be made, a lot of people/companies will scramble for their share of it.
While there's room for rule-breakers (echoes of a great old Apple ad campaign), rule-breaking often lends only temporary advantage - yesterday's exception is today's rule. "Somewhat different" is distinctive; "completely different" is often confusing and/or ignored/shunned. One can argue that Mac's current success in PCs is due, in part, to making Macs
less different - embracing Intel, PCI, ATA/SATA, USB, etc., while retaining that which makes Mac most distinctive - OS X.