We did that. You're welcome to use ASN.1 or some restricted subset of it if you want, and people did for quite some time, but it's brittle and inflexible nature and it's inability to be quickly edited or observed during edit-test-debug cycles deprecated it the minute we had something human readable that could reasonably replace it.

In any case.. computing is entirely about serving human needs.. early computer science sort of missed the boat on that point.