The danger is allowing other gun manufacturers to adopt similar measures for convenience and then once they are already being used by one or more big firearm manufacturers a law being put in place requiring them and making it illegal to remove or damage them.
At which point the info required on those RFID tags will be standardized, for example per ATF specifications, which means anyone will have the means to scan for RFID tags using that format. It will become easy to scan for firearm RFID tags, and law abiding citizens will not have removed, tampered, disabled, or otherwise broken the law to interfere with them.
Such progression does not happen immediately, it is a process.