I completely agree with your points. I am a PC user because, personally, I find it much easier to use. That's just me. Also, historically, in my case, there weren't the programs I used for work made by Apple. And, because of the fact that more programs were made for Windows than Apple, Microsoft was seen as a "monopoly" and sued to make them unbundle IE from their operating system. But, as you stated, they NEVER forced anyone to use IE and you could make any browser the default.
If we use snozdop's logic, because Apple dominates the table market, they should also be forced to unbundle their OS and Safari too. I use Chrome for the same reasons as you and gmail because I WANT TO. It doesn't really matter why.
I came to this thread for the same reason you did to find out how to make Chrome the default browser because I just noticed that Safari was opening when I clicked a link and there were 20 tabs opened from previous times I'd opened a link by clicking the link. I use Chrome at work and on my PC and like that it syncs web addresses across devices. The problem comes when I click a link on my iPad and it uses Safari. Chrome doesn't have access to that automatic link and I lose productivity because, if I forget to manually copy and paste a link and I go to work or use my PC without having my iPad handy, I don't have that link address. In other words, it costs me money.
Apple may not have a monopoly on the tablet world, but, they are using monopolistic tactics. And, I suspect that, if they don't knock it off, they're going to find themselves in the the same boat as Microsoft and be forced to unbundle Safari. We've already seen other tablets gain popularity for similar reasons in their handling of Adobe Flash. If they want to keep their market share, they really should rethink their policies.