Barcelona still needs Robert Lewandowski for now because he is still able to give his best for the team. Barcelona's financial condition which is not yet completely stable will make it difficult for them to find a replacement if Robert Lewandowski leaves even though he currently still has a contract until June 2026. If in the end Robert Lewandowski leaves, he deserves to consider the Saudi Arabian League because before his retirement he can still get a big salary there so deciding to play in that league is much better.
This might be considered more by Robert Lewandowski when his contract with Barcelona is over even though there are many other things that are still very open to happen to him in the future. Because as you said that at this time Robert Lewandowski is still very much needed by the Barcelona team because he can still help more young players to develop in the Barcelona team. And the choice to go to the Saudi Arabian League is actually very good for him before he really hangs up his boots from the world of football.