In my case, it is because there aren't any left that don't do this. Two banks still provide web interfaces that work through normal browsers, but only for their business clients.

This trend started in China, spread to countries like mine, and (as recent history shows) the relatively free democracies have been more than happy to copy some pretty nasty ideas from autocracies like ours — we went through your current news cycle 10-15 years ago, so I wouldn't be surprised if removing the last few vestiges of having control over your computing also came to you in another five to ten years.

What country?