Sugar is sugar, regardless of processing (for example, if you have diabetes, you might be able to eat a piece of chocolate but not an apple, depending on the sugar content of both).
However, added sugar is generally not necessary for survival and adds calories that are just pure sugar, which do not come with that many other benefits.
CaptainMalForever t1_jeenc9q wrote
Reply to ELI5: Why sugar in fruits is good for you but processed sugar in chocolate and desserts is not? by Sensitive_Apple_7901
Sugar is sugar, regardless of processing (for example, if you have diabetes, you might be able to eat a piece of chocolate but not an apple, depending on the sugar content of both).
However, added sugar is generally not necessary for survival and adds calories that are just pure sugar, which do not come with that many other benefits.