The point is that US aid ended up in taliban hands in spite of US policy, not because of it. We know for a fact that the US would have broken ties had Pakistan's enthusiastic cooperation with the Taliban and Al Qaeda been more understood at the time, and we know that because that's exactly what happened when it was uncovered that the mass shooting spree Al Qaeda launched in India was carried out using weapons supplied to Pakistan specifically to give to local resistance fighters against the Taliban.

Granted, the US should definitely have guessed better at the time given how Afghanistan routinely makes irredentist claims on Pashtunistan and Balochistan, meaning Pakistan would NEVER be a reliable ally in stabilizing the country, IE making it more able to press such claims with authority and millitary force, but the point still stands that people are waaaaay mischaracterizing the role the US plaid in the Taliban's rise.