Should a good reviewer then put the "pattu kunjalam" for the "velakkamaaru" and write: 'What' the movie communicates is that the actors, producers, director and the audience are extremely stupid. 'How' does it go about saying this? It says this in the most effective and fantastic way imaginable. It says it so superbly that when you walk out of the theater, there is no doubt in your mind that you are the stupidest person in the world. Therefore I highly recommend you watch it.
Reviewers are essentially re-phrasing the above in a different way when they write: "This is a commercial Vijay movie and so should be viewed from that lens".
p.s: I have not seen Vettaikaran.