I agree. but here are a couple of things to note.
1) the new PMI BOK (v5) has Agile in it! Believe it or not. PMI is not oriented toward any particular vertical but general around project management.

2) The PMI-ACP is NOT a Project Management Certification. the intention is that it is for anyone working an in agile context.

3) PMI is working with the IEEE to create the software extension of the PMBOK

4) The ACP is NOT intended to be software specific. Although you will find it oriented that way as most of us in the Agile work are doing software work, PMI is working to comb out any software references making it project type/ industry agnostic.

Peace
Joseph Flahiff, CEO
Whitewater Projects, Inc.
http://whitewaterprojects.com
Co-Lead PMI-ACP Content Support Team