So these nobles were seizing the time to use women to win over Roland.
If successful, the profit was tenfold. If it failed, at most they lost an insignificant pawn, making the investment very worthwhile.
It's just that such thoughts were too obvious, the approach too blunt, and their understanding of Roland in the end was too superficial.
Roland himself had a certain aversion to the harem, and marrying concubines reluctantly, his personality would not submit to being manipulated by wives and concubines. Under normal circumstances, the only outcome would be divorce. If the woman was very capable and outstanding, there was a high probability of staging a reality version of "Mr. & Mrs. Smith," but the ending wouldn't be as pleasant…
For all these reasons, the "Plan to Expand Roland's Harem" could only be temporarily shelved. For the nobles, this was a great disaster; for someone's eugenics plan, it was likewise.