Some people prefer to buy items from their home country, some people prefer European brand, etc.
One factor of course would be easier service and support from your home country. For example I have called McIntosh on more than one occasion and can talk with someone, getting their input, help, etc. I know if I try to call T+A, for example, beside time zone, there will also be language challenges, among other possible issues. I also dread if I ever have to send a piece back to Germany for service and/or updates. These are some factors that come to mind, I am sure others such as supporting your home come into play.
I will give you one example that my wife and I are dealing with right now. She decided that she wanted to replace our kitchen appliances. She ordered top of the line type products from a German manufacture. This was last April/May. Some of the pieces were finally installed a couple weeks ago but her new oven might possibly arrive in February. The dealer said American brands would have been installed months ago but there are definitely issues getting products from over seas now.