For example:
* A medical degree is generally considered more valuable in terms of earning potential and societal impact than a degree in fine arts, but a fine arts degree might be perfectly suited to someone's passions and lead to a fulfilling career.
* A master's degree is generally considered "better" than a bachelor's degree *in the same field* because it signifies more specialized knowledge and expertise. However, a bachelor's degree in a high-demand field might be more valuable than a master's degree in a less-in-demand field.
To make a meaningful comparison, you need to compare specific degrees.