And there you have it. Factors like this determine if you can win or not.
India's border with China was also largely demilitarized because India was under the silly assumption that China and India were brotherly countries or some shit. China's surprise invasion of their territory sobered them of that delusion for the time being. Chinese forces outnumbered Indian once significantly in theater in every metric, including troops in general. That is another thing that isn't exactly likely to be repeated here.
This was somewhat confirmed because only three years later, in 1965, Pakistan launched a much larger invasion in the Kashmir region, with several times the number of troops that even China employed, under the assumption of the weakness of the Indian military on the Northern frontier. It turned out not to be weak and in the resulting two or so months of the War, India captured over three times as much territory (actual fertile farmland as opposed to the deserts that Pakistan captured) as the Pakistanis and inflicted a fair bit more casualties upon them. The War had ended in India's favor and if it had continued, India would've had the clear advantage.
But yes, if India's Air Force magically disappeared, the other side would have a greater chance of victory regardless of situation.