So all the titans outside that were previously normal just became aberrants? They based that comment on the fact that they didn't act like how the humans expected normal titans would. The key here is that they never knew normal titans had a hard-wired KILL-THE-BOSS command.
Are you talking about where Erwin told the troops to back off from the Titans who were attacking the female titan? Or how he told the recruits/soldiers to stay at the forest's edge?
I just, I don't agree, I guess. Seems like free titan kills to me. As long as they continued to ignore them, there was no reason not to be putting them down. Everyone you kill now is still going to be one less to fuck up some other plan in the future.
If it was the latter, the titans weren't ignoring the soldiers. That's why the soldiers worked as bait.