Yes, and all such violations should be reported and dealt with. However, using a fact from a local scope to make an automatic "winning" argument in a larger, more global scope is disingenuous.
How big does local need to be to assert true then for you? The recent Disney accusations seem rather large. I remember reading recently about migrant workers and the job postings being listed in other states to prevent having local applicants. I guess this isn't a black and white scenario. One H1-B can be taking away an existing local job while another instance in another area might not be. "H1-Bs can take away local jobs" would be a true statement if that local scope fact is true but if you're suggesting that "no local jobs are lost to H1-Bs" then you're wrong. Local scope can invalidate a global scope.
Saying "every" as the GP did was wrong. But the argument is which is greater the number of by the book H1-Bs or the the number of H1-Bs that take local jobs. Is there an acceptable level of lost local jobs that makes the gain worth it?
I feel like it is the conflict of setting a guilty man free to never convict and innocent man. "It is better that ten guilty persons escape than that one innocent suffer" but not everyone agrees with that. They would rather catch the ten guilty persons and would be okay with the one innocent suffering. The greater good maybe? I'm not sure either way.
Sure there may very well be some Optical Physics Software specialist brought in by MagicLeap on an H1-B or some AI wunderkind by Google or Facebook. Far and away the H1-Bs stockpiled by the outsourcing body shops are bread and butter general skilled folk capable of filling basic roles, Linux admins, Oracle DBAs, Java Webdevs, HTML/CSS/JS, IBM MQ admins, backup operators, IT support staff and what have you. Most of it is coding camp stuff, or basic training on particular appliances that could be done in a few weeks. The diversity in IT camp should be going crazy that these sort of basic entry level opportunities are not being offered to folks that really really need it. C'mon Jesse Jackson get a clue here.
There are many, many, many Disney situations happening everywhere. e.g. Google "Southern California Edison outsource". In S. Fla an ex-fortune 500 corp outsourced many IT positions with same "train your replacement approach" and replaced with H1-Bs and they are not alone. It is rampant in the industry. You don't hear about many of these cases because of non-disparagement clauses in the layoff packages. Amazingly Disney's lawyers (should have outsourced the Corporate Lawyer Department to TCS there Big Mouse) neglected to add this standard clause to muzzle the displaced (fired) employees.
A huge proportion if H1-Bs are used to directly display existent IT workers. Period. Far more the rule than the exception.