The 35-year-old Spaniard was awarded the yellow jersey retrospectively after the original victor, Floyd Landis, was disqualified for failing a drugs test.
He then went on to join Segunda Division B football team Coruxo after his retirement from cycling in 2010.
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"There was a player who had transfusions to improve their performance and is idolised today," the 35-year-old told Cadena Cope. "There was a player who used a growth hormone and is idolised today.
"If we give the same treatment to cyclists and to those in other sports, one is doped up to their eyeballs and the other is someone who works for their club.
"It's not about defending cycling and throwing s**t at other sports, but I wish you [the media] would give the same treatment to other sports when you recognise certain things.
"Every age is regulated by certain rules. At the time, Armstrong raced under UCI [Union Cycliste Internationale] rules.
"The day I'm paid €1 million, like many have been paid, I'll say yes or no [about whether I've doped or not]," he added.