That’s true, but anyone with a legitimate concern for confusion can file an appeal with ICANN if someone applies for the name.

If trademarks were a concern, I’m sure Apple would also be buying every .iDeviceName gTLD imaginable. Hell, Apple doesn’t even own the iPad trademark in China, so that one Chinese company would be able to register .ipad as a TLD if it wasn’t for the objection procedures.

There were actually objections to .amazon from a bunch of people living near the Amazon river, but those were dismissed for various (valid, IMO) reasons. I doubt objections to gTLDs with the names of global brands would be dismissed so early.