That doesn't feel accurate to me. If you're laying off employees en masse while getting new h1b visas, maybe - but everybody I know who's gotten a green card from tech employment was employed and working for a long time before that process even started.
If one is just waiting on a status change that’s ok. The labor certification is complete. If labor certification is being applied for as layoffs happen or if large tranches of new H1B are applied for at about the same time - that’s clearly an issue.