Response to 'I know why the caged bird sings' poem

I think the poem ‘I know why a caged bird sings’ by Maya Angelou is explaining the difference between life when your free and life when your caged or trapped. I think that in some ways this poem may be about slavery because she is explaining how the free bird just goes with the wind and tries to find a big worm the next morning whereas the caged bird has clipped wings so he cant leave and his feet are tied so instead he sings, sings of freedom so she says. I think it may relate to slavery because the free bird would resemble free slaves or maybe even whites who don’t need to worry much, they just need to make sure they have enough to survive, whereas slaves were chained, locked up, sad, they cant leave, their feet are tied, much like the caged bird so instead they sing... they would sing about freedom. What life would be like if they were no longer slaves. It would make sense that Maya Angelou would write about free and caged birds or slaves because she was African American, so she could be writing about her ancestors or maybe even herself.