If a company’s goal is to bring rockets to mars/solve world transport logistics/create driverless cars/etc/etc, you are not going to care about what is fair or what creates pressure. You will find the persons that can get the job done. Things like preventing burn out or balancing work with personal life will be dealt within the scope of reaching that goal. Many sensitivities in this thread or considerations of whats fair and isn’t, is really irrelevant. What goal is being pursued, and how can it be reached sensibly, is what matters in the end.