To me, that's less an argument against transhumanism than it is people drawing an arbitrary line and deciding the things they don't like can get one label while

To me, that's less an argument against transhumanism than it is people drawing an arbitrary line and deciding the things they don't like can get one label while the things they do don't, so they can easily point out problems even though the line is mostly arbitrary. Whether I get some small extra perception because of a simple small magnet or because of a complex microchip is irrelevant to the point if they provide the same new abilities and have similar levels of risk and robustness. Similarly, whether we think getting social media embedded in your consciousness or getting a gun embedded in your arm are good ideas has little to do with the prior examples, so to me they aren't examples of problems of transhumanism as much as examples of problems with humans.