It darn well could be. My impression (not backed by rigorous lookup) is that the "Secure Fence Act" approved but did not appropriate, and that NO appropriation was ever provided to cause the Secure Fence Act to be implemented. The usual Congressional smoke and mirrors. Nuke it from orbit, we'd be so much better off.
Fencing has come a long way since then. Not just wood and wire anymore.
Look at the pictures of the Bollard fence/walls. The shorter are called fences — taller walls. Just posted a link.