You missed that point bro. Any way Americans have third supply route Georgia-Azerbaijan-Kazakhstan-Uzbekistan without going through Russia.
A route as risky as Pakistan in the unstable Caucuses with Iran to the south, Russia to the north. Also, they would have to offload the cargo in Georgian ports, upload it again in Azerbaijani ports, then offload it again in Turkmenistan. Countries they would have to deal with: Turkey, Georgia, Azerbaijan and Turkmenistan. A logistical nightmare. If they use the Kazakhstan-Uzbekistan route, then add another country to the logistics.
Also, as someone already pointed out, there are anti-US forces in Uzbekistan and Turkmenistan, which may disrupt the NATO supply lines.
No matter which NDN route NATO chooses, it will significantly add to the cost of the Afghanistan war as the Pakistan route is and will always remain the shortest, quickest and most economical route to Afghanistan. Also, no country in the region can match the quality of six-lane highways and motorways in Pakistan.
Finally, the NDN route enters Afghanistan from the north whereas the bulk of the population centres and NATO bases are in the east and south of Afghanistan, so they will have to traverse half of volatile Afghanistan to reach their destination. Whereas you reach Kandahar and Kabul within 2 hours of entering Afghanistan from Pakistan.