I'd go further and say to never sacrifice your life for any deadline at all. Part of having a work contract specifically means that all risks rests on capital holders shoulders and not yourself.
Of course, some workers are also capital holders, and should be negotiating appropriate terms such that their mission critical contribution is appropriately rewarded. And no one should be compelled to sacrifice their life without this “appropriate reward”, but exactly what that is is always in flux depending on many parameters.
Either they miscalculated the number of employees they needed or they just aren't profitable enough to sustain the workload, both cases are failures on the company side.
And sure, if the company is willing to, they can share some of that risk and reward associated with it to the employees
Who/what/why fails is irrelevant. Anytime you are selling something, including labor, there exists a risk that the buyer stops paying, for myriad reasons. One of those reasons is that the buyer themselves (which could be a business) are not able to sell. Which means that some of the “capital holder’s” risk is inherently a worker’s risk.