Can someone evaulate my argument?

[sharad22]

The following appeared in an ad for a book titled

How to Write a Screenplay for a Movie.
“Writers who want to succeed should try to write film screenplays rather than books, since the average film tends to make greater profits
than does even a best-selling book. It is true that some books are also made into films. However, our nation’s film producers are more
likely to produce movies based on original screenplays than to produce films based on books, because in recent years the films that have
sold the most tickets have usually been based on original screenplays.”
Discuss how well reasoned . . . etc.

The aforementioned argument, in asserting that the writers should write film screenplay rather than books, appears at first glance to be a coherent and fairly convincing argument. However, upon further analysis of the argument and its underlying structure, a number of flaws become evident to such an extent that, one can take neither the argument nor its conclusion seriously. Among the most pivotal shortcomings of the argument is its inability to address – or even acknowledge – its assumptions, as well as its negligence of the information necessary to substantiate its claim.

Firstly argument assumes that only writers, who write film screenplay, are famous and successful. This appears to be a false assumption. There are ample numbers of writers, who are internationally recognized but they have not written a single screenplay. This overgeneralization makes this argument weak.

Secondly argument assumes that most filmmakers prefer to make films from original screenplay rather than from book. This is also a wrong assumption because one of the most profitable and famous film is based on a very famous book Harry Potter. This book is so famous that people still read book even film is produced on book.

The last but not the least argument assumes that consumer for both books and films are same. But this assumption is not a right assumption. Because there are ample number of people who still prefer to read books rather than to watch movie. This habit for some people is due to ease of reading book during bedtime and other time, when it is not possible to watch film.

The argument as its stands has number of shortcomings, the most blatant of which have been discussed above. Had the argument manage to address the aforementioned concerns, both its pursuative ability and its reliability would have been perhaps enhanced to such an extent that it would be difficult to refute. However, in current form, one must conclude that argument is hasty generalization, filled with overreaching assumptions ….