LOL.

There's some "objective facts" in that guys memoirs aparently:

As Martin Cooper reveals in his new memoir Cutting the Cord: The Creator of the Cell Phone Speaks Out, cellular technology was actually being developed in the late ’50s and through the ’60s. By the time Star Trek debuted in 1966, Cooper and his team at Motorola were practically in the home stretch; in 1973, they debuted the first-ever handheld mobile telephone, the brick-like DynaTAC. Cooper himself made the first cell phone call on October 17, 1973—to his chief competitor at AT&T, with whom he’d been in a bit of a cellular space race, as revealed in the book

https://www.sanjoseinside.com/news/qa-why-the-inventor-of-the-cellular-phone-says-dont-ever-fall-in-love-with-the-technology/

The article goes on to explain coopers role in the star trek myth.

Very obviously, handheld devices were inevitable and predictable in the 60s when ToS was written. That was my original point.