It is about the tone of the message. If you had instead written something along the lines of "for those who have mighty adversaries and who actually need this

It is about the tone of the message. If you had instead written something along the lines of "for those who have mighty adversaries and who actually need this for their own security, one should be aware that things like hardware switches only go so far" and then an explanation. Instead you wrote it in a way that I and probably a lot of others took to mean: even hardware switches doesn't matter.