Adames is not similar to Hiura at all, especially with the Ks. Adames Ks 27% of the time, which is below league average but not that extreme in today's game (guys like Trout, Buxton, Story, Stanton, Schwarber, etc. all K more). Hiura, on the other hand, Ks an astronomical 44% of the time, which would be the highest K rate in the league by nearly 10% if he had the at-bats to qualify. Never before in the history of the baseball has a guy K'd that much and still managed to be a productive player...
Also, you leave out the fact that Adames is an excellent defender, whereas Hiura is.......not. Combined with his home-run hitting prowess (leads all NL SS), Adames' value becomes so much higher than Hiura's, as exemplified by his clear top 5 NL/top 10 MLB SS WAR.