And the number of Americans I know who work in tech who are looking for work right now as H1B's post on LinkedIn and publicly make deals to keep Americans out of jobs proves this. Its all being done in public.
The thing is, the original H1B ideal is temporary; and so is they cant meet market demands sustainably that way, not if they are growing, and they should be growing or they are dying, and so such companies end up being dependent on offshore imports of H1B people and end up dying when they cant replace them or grow new roles without them, because they started to depend on them and then could not be sustainable outside of that bubble on the real market.
The dependency they have is on subsidized cheap labor from other countries that don't asked to be treated like humans, not a lack of skilled tech workers. They have more tech workers than they need, many with more skills and more years of experience at higher end tech roles, many who are looking for work right now in the holidays, and they are just not hiring them because they want to save a few pennies and hire a developer that they have legal ownership of as an indebted visa-slave.
And if your hiring software developers, I know many who are looking for work, who are American citizens, who would gladly take the job that an h1b is currently sitting in.