No, the opposite. Every other investor wins because they can invest more $$$ and own a bigger % of the company. Before, YC had a right to maintain its 7% stake, leaving less room for new investors to acquire ownership.
it makes it hard for startups that would need more money to prove their profitability to lose out on new rounds, or have to give up more for those rounds (as investors will need better incentive to invest without the YC signal).