correct. this was considered as negative gripping. a lot of recent-era matches were 5-minute grip fights nobody wanted to watch.
i don't think back takes should be scored in Judo as it's not the objective. i do think that defensive turtling/playing dead should be penalized as noncombativity. a lot of recent rule changes are designed to combat standing defensiveness, yet we still allow defensive groundwork.
the rules push for throwing action, and the points are most definitely geared to reward a controlled, hard throw onto the majority of uke's back.