I saw where you got your info, and I wasn’t criticizing you, I was criticising it, as well as informing anyone who wished to read about it. It was certainly not an engineer who wrote that, but someone in the PR department.
I would assume because it sounds more impressive. But it really is comparing apples and orange trees.
It’s not very informative, as you don’t try to run your watch off of radio waves, and it is not as though people are unfamiliar with other forms of radio receivers in their daily lives.
If they compared it to cellphones, then it loses quite a bit of its impressiveness. A cell phone can go down to -85dBm, which is on the order of 3x10^-12. So your cellphone can pick up a signal only about 10,000 times stronger.
At least they didn’t go the other way, and claim that the Voyager signal was trillions of times weaker than your microwave oven.