What’t the reason behind pride parades in the countries were LGBT people already have the same legal rights as everyone else?

For example in the USA, UK, European Countries, Brazil, Australia and Canada are a few countries were pride parades happen but in these countries I think LGBT already have the same legal rights as non-lgbt people.

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In these countries I mentioned above I believe there are already anti-discrimination laws in place to help protect LGBT and same sex marriages are legal.
What’t the reason behind pride parades in the countries were LGBT people already have the same legal rights as everyone else?
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