My response was to the "relative inaccessibility" remark. Do most people using down tube shifters put a box around them to reduce their access? It seems that many generations got along just fine with their relatively inaccessible down tube shifters.
I never said that other shifters have no value. Please try not to change my words to make a ridiculous point.
First downtube shifters, and to some extent barend shifters, are inaccessable if you are climbing standing and determine you need a lower gear in a hurry. No "box" is needed under those conditions.
Many generations also got along with 3-speed manual transmissions, manual steering, non-power drum brakes, no air conditioning and no power accessories in their cars too. Do you still drive a car llike that? Did it take Kool-Aid to get you to pay for a more modern car?
OK, you never actually said you saw no value to other shifters but your words did imply that only marketing (i.e. Kool Aid) convinced most riders to buy them, not merit. There I very much disagree and don't think my point is at all ridiculous.