Not all players will be tempted by a high salary offer, there are also players who want a brilliant career by playing in top teams, I think Lautaro Martínez is like that, it would be a shame if he was willing to move to the Saudi Arabian league, of course his career would fade away, now he is still very young and there are still many possible possibilities in his football career and also Lautaro Martínez is currently the mainstay of Inter Milan.
Of course not all players want to play in non-European competitions if they still feel they can fight and play well in Europe. If they are still young then they still hope to last longer in the top flight rather than receiving high offers from non-European teams such as the Arab Pro League. Lukaku, Martinez and several other top players are likely to want to stay in Europe, but it is possible they will accept the offer if one day they are no longer needed in a top European team.
For me Lautaro Martinez is a striker who can still make a big contribution at Inter or maybe at another big team in Europe. He still has a chance to compete to be the best in his position, so moving to the Arab Pro League is not an option for him right now.