The question is answered. You don't need to post anything else.

Russia uses the R-7 ICBM-derived Soyuz launch vehicle for most of its space launches. The advantage of it is that there's no concern on what the weather is like on launch day and Soyuz launches almost never get postponed due to weather. The only ICBMs the USA used for crewed flights were the Atlas for several Mercury missions and the Titan II for the Gemini program. The Saturn V must have been quite strong too obviously, they even launched Apollo 12 during very bad weather.

Many present-day rockets of NASA are quite weak and launches get postponed due to not very strong winds. Why don't the USA use ICBMs for crewed and other more important flights? They aimed to launch the planned Dream Chaser on the Atlas V but the plans for the crewed Dream Chaser went on hold for some reason.

Russia uses the R-7 ICBM-derived Soyuz launch vehicle for most of its space launches. The advantage of it is that there's no concern on what the weather is like on launch day and Soyuz launches almost never get postponed due to weather. The only ICBMs the USA used for crewed flights were the Atlas for several Mercury missions and the Titan II for the Gemini program. The Saturn V must have been quite strong too obviously, they even launched Apollo 12 during very bad weather.

Many present-day rockets of NASA are quite weak and launches get postponed due to not very strong winds. Why don't the USA use ICBMs for crewed and other more important flights? They aimed to launch the planned Dream Chaser on the Atlas V but the plans for the crewed Dream Chaser went on hold for some reason.

The question is answered. You don't need to post anything else.