Romanticism poem annotation

I believe the reason William Blake wrote contrasting poems on innocence and experience was to show an event taking place where orphan kids were cleaned, dressed up, and meant to march in front of people to bring attention to them and their needs. The innocence part of it is shown by the kids small stature and clean face and hair. They used bright colors and words like flowers, little, heaven, and harmonious. In the experience version, the poem is based on the same event with the orphans marching. Except this one focuses on the darker side of it. This time, the poet uses words like misery, cold, userus, and poverty. It says how the children are poor and crying. They are being used to march in the streets and make people feel bad for them so they will pay to help them. The phrases "and their sun does never shine" and "and their fields are bleak and bare" show how negative the poem is. They represent experience by the dark and strong words used. Some words like thorns, hunger, and eternal show how in life, you experience hardships and go through difficult situations. They take tolls on your body and can wear it out. Which shows experience.