I've been both an employee and an employer, and things are hardly so one-sided. For example, an engineer friend of mine works for a mega corp. He has cancer, and has been undergoing various treatments for years. The corp has bent over backward to be accommodating for his needs, such as time off for treatments, schedule adjustments, etc. For example, he's got chemobrain and they've found productive work he can do.
The corp has my respect and gratitude for this.