Are there a lot of patel's outside the creamy layer ? https://en.m.wikipedia.org/wiki/Creamy_layer
The forward castes are 30% of the population and can still get 50.5 % of the seats, and actually even more in practice. So, the numbers are not absurd, but quotas are reviewed every ten years, and not permanent. And the quotas don't apply to the rich backward caste members. See creamy layer.