What is the wisdom behind the differences among scholars in rulings though there are proofs for their permissibility,
such as differing concerning the permissibility of performing the Funeral Prayer for the absentee?
said that this kind of prayer is not permissible.
considered it to be permissible. Moreover, the Hadith that was reported by
confirmed what was said by
All praise is due to Allah Alone, and peace and blessings be upon His Messenger, his family and Companions.
Differences among Imams of jurisprudence may be due to their differences in understanding Hadiths, their being unaware of them, dispute in giving preponderance to one of the Hadiths over the other in case of contradiction, dispute concerning the abrogation of the texts or for any other reasons. For more information, you can read the book entitled Raf` Al-Malam `An Al-A'imah Al-A`lam by Shaykh Al-Islam
Ahmad ibn Taymiyyah (may Allah be merciful to him). You will find in this book that which will satisfy your needs.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.