“would refusing to train mean that the H-1B would not be given that job? “
It means he and the corrupt bastards that made the decision will not keep theirs.
And it would deter others, knowing the damaging outcome to business operations.
You can be the very best network engineer in the world, but if you go into a complex corporate network without methodical transition and training, you’ll be breaking stuff for a year.
And some of it will be really, really big stuff.