As the heraldic expert A. C. Fox Davies has said, somebody doesn’t need to own a coat of arms to have dignity, respect, to be a person of value. It is simply not necessary.
So what does a coat of arms do?
It’s not to guarantee value to a person, but to reflect value. To become an unchanging “seal” that represents, in a visual way, all those elements inherent to a person. It is an illustration of distinction. A symbol you can use in a billion of different ways.
A coat of arms is a name you give to yourself, only that it can “speak volumes”, like symbols do, even to people that can’t read your name. It represents all those elements of character that never fade.
The granting of a heraldic device is a sign of personal growth. Because, in the end, it only makes sense to compare yourself to yourself. Moreover, it is hereditary, so it also represents all those values that you want to leave to your descendants.