Because with Crush, BJ were popular again in the US, they tried to repeat their success with Bounce, by producing some more simple pop tunes for the simple American. They tailor their concerts to the simple minds of the Yanks by playing simple pop songs. These Days wasn't popular at all in the US so they don't play songs from it in concert. They forgot that These Days was hugely popular eveywhere else, but f*ck everyone else because they are popular in the US again.