Our foreparents of FOSS (e.g. RMS) fought to destroy copyright. Copyleft was a subversive mechanism to "neutralize" copyright using the laws of copyright against itself.

Hypothetically, I think this trail of suggestion of treating specs as intellectual property would simply destroy copyright for software, which is what we (the people who believe in FOSS) want. There is already case law protecting specs (e.g. Java)