As Bitcoin is not widely accepted in your country then you can use bitcoins online to buy the goods you want.
There are many websites which give us function to choose to pay in Bitcoin and there also are sites like purse.io through which you can buy goods from Amazon and Newegg offers fully Bitcoin interface and their user reviews are also good.
I dont think that way, most of them buy it online because they didnt have time to go there to get the items. Lets say you live far, at least they must have people that selling the items near your country so it will cost cheaper. This online site will make us buy things easily from them just add some cost, it will ship right away to you and now you using bitcoin I think it is much more easier
I think people prefer to buy their stuff by online because the stuff they need isnt available in their city. Beside that, there is a risk when you buy it in online shop, which you couldnt check the quality of stuff you want to buy directly. I guess you said its easier using bitcoin maybe because you are living in country that accept bitcoin as payment.