Yes, you can run with disposable brands. It's a perfectly viable business strategy in many cases.

However: if you do that you are missing out on the benefits of building a good reputation. Even in the cases, where your product _is_ actually good.

So another perfectly valid business strategy is to build a longer lasting brand. Like Apple has done. (Or countless other companies.)

In most markets we see both kinds of strategies at play. As a customer, you can usually decide which kind of strategy you give your money to.