"Rise to prominence." What those words meant, and what they represented, was different now than what they had meant during his time in the Fang Clan. There, rising to prominence involved he himself flying to great heights.
Meng Hao was a member of the Fang Clan, and the Crown Prince of the direct bloodline at that. His father had a profoundly high cultivation base, and Meng Hao also had the support of the direct bloodline Elders.
Because of that, rather than saying that he had helped the direct bloodline rise to prominence, it would be better to say that Meng Hao had been demonstrating his own worthiness.