Why Kiev and Minsk became tourist attractions

Why were Kiev and Minsk selected for tourist use rather than following the same course as their sister ship?

The tentative explanation is that other uses were less viable, leaving study and tourism as practical options.

Kiev and Minsk are contrasted with the different fate of a sister ship. The tentative explanation is that the two vessels were not considered viable enough for another use. They could instead provide opportunities to learn from their construction and then serve a non-operational purpose.