It’s an interesting article, but there are some real problems with comparing implanting a chip with an IUD or contact lenses. The first is that the wearer can take them out or get them removed fairly easily. The second is that there are medical benefits for specific conditions – an IUD prevents pregnancy and contacts help you see.
This article also fails to adequately discuss privacy concerns. Technologies like Alexa and even certain baby monitors can be hacked. I have a friend whose baby monitor was hacked every couple of months until she got rid of it. People who wish to sell us things would also love to have ever more information on us and so there would be strong motivation to sell that data.
Until and unless privacy and security can be adequately addressed I consider this an unacceptable technology.