Don't forget that the Security Operative is just doing their job. They don't make the rules and they don't even interpret them themselves, they are told how to do it.
For example, as part of my job I have a tools pass that allows me to bring shotguns, firearms and hundreds of rounds of ammunition (including explosive projectiles) into the secure area. But I cant bring my yoghurt through. Why? Because the Liquids Regs prevent me from doing so.
The security staff think its as stupid as I do but they have to do it or risk either losing their jobs or potentially (in absolute extreme cases) face criminal charges of endangering aviation safety. They aren't allowed the discretion to say that other equipment I carry is infinitely more dangerous as they have to comply with and enforce the regs rigidly or they will lose their jobs.