Amazon is just so convenient, it's hard to say no. If I need new socks, I can press one button and somebody brings it to my front door in a couple hours at a cheap price. Alternative? Order them somewhere else online and get them in a week or drive 20 minutes, deal with parking + crowds to get them a couple dollars more expensive.
It's a crap situation but I understand how Amazon got so big.
In the US, you can get Walmart and Target delivered to you in 3 days for a lot of stuff, but I'm not sure if ordering from them is much more ethical than Amazon.