The Turkish army’s timing was wrong.
In 1960, 1971 and 1980 they could overthrow the Turkish government, as the Egyptian army did in 2013. But today Turkey has too many radicalized Moslems. At best the army will fail; at worst it’ll start a civil war which will “invite” in Russia as did the war in Syria. It will only increase instability in Southwest Asia.
As Ben Franklin (proverbially) said, “Revolutions are always legal in the first person–‘our revolution’–but illegal in the third person–‘their revolution’.”
They were on the wrong side of history.