If you want a lightbulb that changes colors to be controlled by a phone or network accessible device, as opposed to some other sort of special RF remote, and you DONT want random other people to be able to control or possibly disable or damage your lights, then it kinda needs to have an account.
By all means, avoid iot stuff if it's not your thing, but then why are you looking at color changing lightbulbs? The ones that need special remotes are terrible gimmicks and the ones that get wired into a hardwired home automation system cost a fortune to set up and require a ton of installation.