There are some good questions "What happens if the data on the blockchain is wrong? What happens if the data is prejudicial, re-inscribing the prejudices that data collection and school practices already enact?"
Of course it's a;ways hard to accept something new, that's why there are a lot of doubtings or even rejection among public..But I'm sure that each system could be devoloped till the ideal form)
I think that blockchain will change educational system and solve current problems and when ordinary people will realize how blockchain "works," and accept smt new we could start to change)
The problem is that ordinary people hesitate doing that. Maybe, some educational projects like this could help them?