The statement that modern films tend to lack full-length themes is subjective and can be considered both true and false, depending on one's perspective.
True: Some critics argue that many contemporary films prioritize spectacle, special effects, and entertainment value over deeper thematic exploration. This can lead to a perception that themes are underdeveloped or overshadowed by other cinematic elements.
False: On the other hand, many modern films do engage with complex themes such as identity, social issues, mental health, and existential questions. Numerous filmmakers continue to create works that explore these themes in depth, often reflecting the nuances of contemporary society.
Ultimately, whether modern films lack full-length themes can vary widely from one film to another and from one viewer's interpretation to another.