The discussion was merely about whether or not senses are trustworthy, you seem to have forgotten that somewhere along the line. I said senses are trustworthy, because they are the one and only thing you can perceive reality with. Then, an army of what I can only assume is psychics started telling me that senses are not trustworthy. If you believe senses are trustworthy, then you should be helping me tell these others that this is so, not arguing with me about using instruments or something.
Can you detect a radio broadcast, or WiFi, without a device or instrument? No, you cannot.
Therefore, your senses are not the "one and only thing" you perceive reality with. These signals are all around you, part of your reality, but without a device or instrument, you would not be aware of them. They are outwith your sensory capability. Perceiving them through an instrument is not the 'first step', as the instrument must be built before you can look at it or listen to it.
This is why your senses are not fully trustworthy, because some matters are outwith their capability. Extending this to say you cannot trust them when viewing the instrument, because you can't trust them to find what the instrument can is a false equivalence. You can trust them to view or listen to a geiger counter, but you cannot trust either your eyesight or hearing to directly perceive radioactivity.
One more time; do you drive vehicles?