Freedom within limits. Your Baby needs freedom to explore, but she also needs limits. You need good judgement to provide both. Babies kept in playpens or high chairs for much of the day don't have enough freedom. They are too limited.
Baby needs freedom on the floor to explore.
That is too much freedom and is dangerous. Baby may cry about the limits you have set. You may be tempted to give in to her demands. Keep in mind that setting limits is necessary for your child's safety. Say, I know you are angry, but you are safe.