They don't matter that much if it's not relevant in his direction, and again, DoX is designed to have a delicate but important balance of appealing to
current fans, lapsed fans and new fans. Catering
only to those who cling to the ongoing narrative and continuity of the comics no matter how much they often hate it isn't good business sense. It's a jumping on point that would be bogged down by stories that many of the people they need to attract for sales wouldn't be inclined to go back and read anyway.
Comics aren't a cheap hobby. Getting it at the ground floor on a clear new seismic shift moment is better than getting a "homework assignment" to read X, Y and Z by different writers of varying quality before you can even begin to understand what is going on with stories or characters. Marvel and DC need to do this every once and a while, and take risks, or else the industry will be in even more rough shape than it is. There wasn't much, if any, excitement around the X-Men in the few years before this relaunched. You may have liked it, but evidently not many people did.