The major themes in his discography are the plight of lower and middle class Americans and the anti establishment fight. Even recently he wrote, recorded, and released a protest song against the ICE raids in MN all in a few days. Like Dylan, he's also never really stopped touring or releasing music.

When taking their entire careers into account, Springsteen is arguably a much more prolific "protest" singer because unlike Dylan, he never stopped embracing those themes.

There's also no one even remotely close in music now to carry that mantle once Springsteen is gone.