Is this why the NT is filled with references to the OT and is literally the fulfilment of all the prophecies there? Jesus Himself refers to the OT and both Mathew and Luke give us His genealogy from king David.

You're doing freestyle interpretation of a text while being outside of the tradition that conceived it, kept it, and posses the correct interpretation of it - the Apostolic Church where the Holy Spirit resides. The chances of you getting to the correct interpretation on anything concerning it are very slim and you, as every other Bible enjoyer gnostic or protestant out there who thinks they are the sole authority on scriptural interpretation, immediately fall pray to ancient heresies. Rejecting the OT is known as Marcionism and the Church fathers deboonked it a long time ago.

Is this why the NT is filled with references to the OT and is literally the fulfilment of all the prophecies there? Jesus Himself refers to the OT and both Mathew and Luke give us His genealogy from king David.

You're doing freestyle interpretation of a text while being outside of the tradition that conceived it, kept it, and posses the correct interpretation of it - the Apostolic Church where the Holy Spirit resides.