No, but they're consistently reasonably close to that. I'm not likely to pay drastically more on Amazon than elsewhere.
What they do have is a very large selection, which is a major benefit; I don't want to deal with eight different retailers and eight different orders when I can just hit Amazon.
At a lesser scale, this is what made department stores do so well.
A department store is a retail establishment offering a wide range of consumer goods in different areas of the store, each area ("department") specializing in a product category. In modern major cities, the department store made a dramatic appearance in the middle of the 19th century, and permanently reshaped shopping habits, and the definition of service and luxury.
Amazon's basically done the same, writ large. They can offer pretty much anything you want from a consumer standpoint at a single location.
People only care about price so now everything is built as cheap as possible, corners cut everywhere so now everything is shit.. because it needs to be cheap! It’s getting harder to find anything that seems built to last more than a year.
As scummy as Amazon might be, they’re still the only company that offers anything that resembles convenience. eBay could’ve challenged Amazon but profit over service and those in charge walking round with their head up there arse’s and now it’s a poor copy of aliexpress that seems to be 90% chinese crap in the UK! I’m not wasting an hour trawling every online store when I know Amazon has it… so what if its £3 more!
And sadly the cheap money has gone and no-one wants to offer a better Amazon because there’s money in it because… everyone wants everything cheap! 🤦♂️😞