Humor me how will a scenario of 1962 repeat?
The civilian and military leadership of India of today is not whatever disorganized mess there was in 1962. We had inferior weapons, no weapons manufacturing capability and not much weapon acquisitions from foreign nations neither did we have that kind of money or economy to buy stuff then.
Plus in 1962 we had a lot of undermanned posts and tactical blunders led to destruction of some strategic points that's not the case now.
The West looks to India as an bulwark against China, in reality neither India nor the west trust each other completely but they'll take whatever dig they can at China. Not implying that US will put boots on the ground or help India directly, there are other ways like Intel gathering and weapon sales on a higher scale.
And look at India's current arsenal it's ranked number 4 globally for a reason.
Among the handful of nations to have hypersonic missiles, nuclear weapons, thermobaric weapons, ASATs, nuclear submarines, relations with both east and the west. Almost every major power has diplomatic relations with us and agrees to sell us stuff.