Truth is, I absolutely care about canon and consistency; but over the years I realised that no matter how much changes and continuity problems bothered me, none of that bother or whining by me changed anything. So although privately I might think about how things might fit together, I also accept that, as a franchise owned and operated and designed by several people over decades, and that I can't expect consistently in that context. If I want to enjoy the show, I might as well put those concerns aside and focus on the story and characters, and then on the side doing my own thing (like my starship designs and so on).