I believe that’s already the law. https://www.uscis.gov/archive/options-for-nonimmigrant-worke...
“The maximum 60-day grace period starts the day after termination of employment, which is typically determined based on the last day for which a salary or wage is paid.”
That likely was the assumption and source of trust, i.e. enforcement's goal is to uphold order and has a sense of logic when being implemented. The current upset has a context of the breach of such trust. In other words, the enforcement now is sometimes aligned with Trump's domestic politics maneuver rather than immigration law enforcement, it is increasingly hard to not interpret new rules between the lines.
Since H1B visa holders possess valuable business skills that can’t be found domestically it makes sense to recruit them when they become available