No, it doesn’t imply that.
As I wrote: a track is still a track (series of trigs), so it needs a sequencer to execute this sequence step by step to make sound. PLAYS FREE means it uses its own sequencer (so to speak) and not the common sequencer where all the uncool other tracks are “hanging around”.
PLAYS FREE means it can be started by its own and doesn’t start with all the others.
To play a longer stem (where you need just a single trig) is not the only use case for PLAYS FREE tracks, but just one of many.