Most evidence indicates that OPT graduates create more jobs for US-born workers through business formation than they "consume," so this change would get us further from full employment for US-born workers. See e.g. [0] [1]
I'm not sure I fully trust this data anymore. If all of the major US companies have a CEO that is Indian, and these companies still employ a lot of US people, but that number is changing fast - is it really just a study that's trying to convince you not to believe your lying eyes
what are your eyes telling you? whatever they are telling you, you would feel the pain if you actually ran a business and were restricted in hiring to make "US 100%" this is why companies spend tens/hundreds of millions lobbying politicans and why we have a charade of OPT / H1B by the current administration while no one is talking about much bigger issue which is outsourcing. In a company I contract for, 47% of all employees (out of 4k) are outsourced. but you won't hear a peep about that cause you just go to mar-a-large with a large white envelope and problem solved while the "masses" are eating up this "OPT" and "H1B" charade. Too funny...