That's not true, but this kind of devices has been subject to extensive thought experiments in science fiction and philosophy and found lacking actual use.

It's like a watch implant. You need to know time, looking at tower clocks and wall clocks isn't too convenient. Wrist watches and in general portable watches were a thing of beauty, but also quite useful for military commanders, sailors and pilots. But this progression doesn't lead you to implanting a watch into your hand, so that you'd always have it.

Similarly, this progression doesn't lead humanity to needing such devices, or honestly much of modern computing. It's just a personal computer. Even smartphones are honestly a less than convenient form factor, approaching minimal usable size.

All this is just a way to spend resources in some other way than actually building a unified humanity with access to good medicine, education, connectivity, food, political and labor rights. That's not even because those powerful people are evil, - I think it's more because doing anything real with such implications can get you killed. Even a supposed rich psychopath isn't usually evil, doing a good thing weighs about as much as doing a bad thing with the same amount of resources for them. We live in a time when those resources are actually present in the world, - 100 years ago this wasn't yet true. Which makes improving anything for real a dangerous endeavor, because every such improvement destroys someone else's base.

A bit like a capitalist version of late USSR's deadlocks.