Having read - closely - the OP's original post, (and winced; my inner grammar fascist and anal retentive spelling nerd had to be gagged with duct tape), the very same question occurred to me.
Probably several reasons. To name a few:
1. Larger selection of games and software in general
2. More familiar with the PC.
3. Price of entry and I think this is a big reason. When the cheapest Mac is 1000.00 for an 11" screen when a rather nicely equipped PC with a larger screen and arguably better specs can be had for the same or less.
......
That having been said, I am seriously interested in a MBP partially out of curiosity because of my great satisfaction with both my iPod touch and ipad. But also the demo macs I have played with have a certain "feel" that I haven't ever really gotten from a PC.
That is it; price (which matters in a recession, with salary cuts), versatility, wide availability of user platforms, the fact that Windows machines dominate workplaces and one needs to be familiar with them, and obviously, gaming strike me as the obvious reasons for choosing PCs over Macs. My brother has just bought a Samsung laptop for around a third of what I would pay for a machine from Apple with considerably lower specifications.....
Personally, I prefer Apple (because of OS, because of warranties that are honoured, because viruses, malware, trojans and spam are so much less of a nuisance on a Mac, and of course, because of the sheer style of the computers Apple makes). However, others make their - rather different - choices for perfectly good reasons.
Because it's cheaper. But seriously, who cares what people use.
Indeed. I agree with you. Completely.