[dataflow]

No idea what the actual reason is, but I could potentially understand the argument that passing such laws would suggest to courts that other categories that they might've thought were already intended to be protected perhaps actually weren't so.

Moreover, every new law carries a risk of having unintended consequences. So the argument may well be as simple as, if it ain't broke, don't fix it.

(That said, I don't get the impression everyone who opposed it did so for the same reasons.)