Many white goods suppliers offer free collection of old items, use one of them next time you buy something.
Those are the privileged words of somebody in the position of being able to go straight to Currys or John Lewis or wherever when the fridge or washing machine gives up the ghost and needs to be replaced. Even then, a lot of them will either charge you an extra £20 to take the old one away or will adjust their prices to take account of it. Either way, for somebody with £300, £500, £800 available, it's not generally an issue.
If you're on a low income and/or benefits, second hand on Facebook or eBay are often your only realistic options, and individuals selling a single used appliance don't usually offer a service to take the old one. That £40 or so charge could actually equal the price of the 'new' one.
Added to that, those who can afford a new Bosch washing machine will probably not have to worry about scrapping it for 10 years or more; those who can only pay £50-£100 each time, for a well-used/cheap one are likely to be needing a new one every year or more often.
In fact, considering that it's really pot luck what you get when you have no choice but to buy dirt-cheap from Facebook, with no consumer rights, you could even argue that some better-off people are fly-tipping on to poor people, and making them pay for the privilege.