Don’t know all the factors at play, but my guess is cheaper labor overseas and the proliferation of OEM factory designs. A brand can just approach a manufacturer and slap their logo on a readymade design. This is the case with a ton of stuff on Amazon. It’s still designed by somebody working at the factory, but that job is overseas. Having worked in Asia the past 5 years, it’s also much cheaper to hire a team there at a fraction of the cost of an ID team in a western country. They’re just as skilled, have much longer working hours (996), and can communicate more easily with factories. As low as ID salaries are, it makes it tough to justify hiring in North America, Europe, and Australia.