How does an illegal alien get presented with any sort of rights let alone a "Probationary right to work"?
I came here for holidays (snow birding, really - sick of shoveling snow) and when my now-wife & I decided to get married, I put together a document package (driver's abstract, criminal record search results, divorce paper etc etc - anything I could think of and could get a piece of Govt. letterhead to support) and attached it all to my application.
PITA? Hell yeah but why wouldn't it be difficult? And tedious? That said, a few months and some fees - got a lawyer - et voila: visa and perfectly legal to carry on business etc like a born here or naturalised citizen.
If you want something, one way or another there is always associated costs and work to be done. The more desirable, the more work.
People who want to door crash and then take up residence, uninvited and un-vetted, used to be scooped up and returned home. Now, courtesy a long line of SJW Politicians & civil servants, the US has a changing face and not for the better.
An outsider's viewpoint; ignore if you see fit.