Sometimes lawyers get down to even lower repute because the profession has to say, "it depends." Oh well....
I think, after the prior United flight with a blade failure in the same type of engine, if the airline then failed to comply fully with all mandated inspection timelines and procedures...that could quite likely amount to something that the "it depends" expression is meant to cover.
Lurking in the background here is the fact that, at the time of a second anniversary of the ET 302 accident with far more significant losses and wrongful acts and the Lion Air 610 losses as well, a claim for fright, by itself and without any other harmful effects (reported so far), seems.... well, it seems trivial in comparison.
(As long as the prior United flight has become possibly relevant, just to note the interview of the Captain of that flight recently posted on another site was just a fascinating glimpse into a world an SLF ought to realize one knows virtually nothing, really, about.)