The two problems I care about most that decentralization is trying to solve are privacy and censorship. Another important one is not having something important

The two problems I care about most that decentralization is trying to solve are privacy and censorship. Another important one is not having something important disappear, like happened to millions of websites when Geocities went out of business. Also there is good connectivity for populations that presently lack it, like in African countries. Also there is connectivity during emergencies that cut off the centralized web. I am a bit surprised you are not aware of all of these, since they have been extensively discussed in the last few years.