Yes, much of the blocking is required to prevent problems real or imagined, without actually finding out if there is a problem. The kids would be better off if they had the opportunity to learn best practices from educators who can gauge what is appropriate and how these life skills can be taught effectively.
Some of the blocking is a joke. All the really great online educational resources are blocked, including access to sites that the school is paying to access. Sites with “educational games” are permitted even though they have tons of advertising and the games have little or no educational value. Blocking can’t be removed or altered to allow access to the good resources because there is no process in place for that. Anyone with any authority to make those decisions does not have access to the technology that does the blocking.