According to this article Russian government believes that 2018 World Cup will help Russian economy on the medium term:
a survey by the Russian government last week. It said the World Cup's boost for the country's gross domestic product (GDP) would be between $26 billion (€22 billion) and $30.8 billion over the 10 years from 2013 through to 2023.
This article argues about several Western countries considering boycotting World Cup, but AFAIK most of them actually attended the competition:
(..) are Poland, Iceland, Denmark, Sweden, Australia and Japan, with more expected to follow.
About two days ago I have watched on TV a short documentary about this issue and some analysts argued that World Cup will also help Russia improve its international image using the competition .
Considering above, attending the World Cup in Russia seems to contradict existing Western sanctions.
Question: Why didn't Western countries boycott the 2018 World Cup?