Is Facebook B2B marketing doomed to fail?

By the end of 2018, there were more than 2.32 billion monthly active users (MAU) on Facebook, of which almost 15% in Europe. Considering the growth with 9% of MAU in Q4 2018 (from 2.27 billion in Q3, despite the spicy debates that occurred in 2018), any businessman would see a growing potential of using the platform. By the same time, over 1.5 billion were active on a daily basis. Add here the fact that business decision makers spend 74% more time on Facebook than other employees, and engage with a wider variety of topics. Getting warmer?