So that Liverpool were involved in this transaction too.* It serves the FSG interests greatly for Leipzig to sell Simons so that they would be keen to obtain a replacement in the form of Elliott. It is also in their interest to associate Elliot's value (asking price) with that of Simons. Even though they are T O T A L L Y different players. Elliott is NOWHERE, NEARLY in the league as the same sort of a player as Simons. Simons has a true world class potential. Elliott never had it.
Personally, I would have much, much, muuuuuuch preferred the FSG to obtain Simons in exchange for Elliott, even if it means not obtaining Isak.
* I think that Liverpool are now clearly dominating the non-Spanish and non-Latin football market. What they do carries great value. So that what others do and end up doing happens afterwards as secondary instances. Liverpool have options to make their choices first. If they don't make good choices they can pass up great opportunities. Getting Ekitike AND Isak while avoiding the clear availability of Simons I personally see as an error. Again, Ekitike and Isak are the same type of a player. They cannot play together. While Simons can play anywhere up front. Can replace Salah. Can replace Wirtz. Can replace Gakpo. Has great pace and energy. Can come off the bench. Had no major injury problems.