I don’t think one has to exclude the other, just as we auto-fill the notes content of the event you are linking a note to, we could also auto-add the people tags once we support proper integration with the address book, which has always been the plan from day one.
Again, we don’t want to go the specific fields for ABC route, you quickly end up in a csm/database/very structured scenario. Instead we prefer to offer the building blocks that allows building your workflow. A combination of templates and contact integration can make all of this totally feasible without any need for specific fields.