Because not having hundreds of keywords means that either you have some parts of the language that are "this has a special meaning please don't touch" (double underscores are good enough, right guys?) or "we reassigned 10 different things to the same keyword to keep the number low" (ahem, static).
I’ve spent some time looking into swift as well and was quite pleased with the overall language, it really contained some really good ideas. This makes it a bit of a shame that it is tied so closely to Apple