This wasn't done out of 'let's also do something'. Not at all. It's for many people out there who are tired of bearing their burdens alone. It's a reminder that our God is 'A-bá-ni-gb' ẹ́rù', He is a burden bearer. All you need do is cast your heavy burdens on Him. He will bear it all.
The song is to tell you that you should not continue to carry that burden alone, allow Jesus carry it for you.
The song will lift your soul and spirit. It will relieve you of whatever burden you are carrying. It will encourage you, it will bring your hope alive again.