Honestly speaking i don't even understand why somebody would prefer tendo to hashirama. Tendo now is more or less free and will be even freer as soon as they unlock next levels in ultimate training. Moreover as a standalone ninja in a single lineup he is in no way useable now with kage metas and will be even less later with jinchuriki (while hashirama is still pretty useful). Right now he is good only in gnw and ranked if you have the pain lineup + a non autobarrier ninja as support, so, if had to get tendo as my first superrare in tendo treasure i would consider myself very unlucky.