Your sir is absolutely incorrect.
Here are some words by renowned faculties:
CMA Rakesh Singh (President of ICWAI, now ICAI): Articleship in our profession(CMA,CA or CS) is not a formality. It is for the benefit of the students. [Source: TV interview]
CA Praveen Sharma (Accounts) - I always keep classes in morning or evening but never during office hours for CA Final students because I feel articleship is necessary for every CA student. I am following this principle since I am in teaching profession. [source: Interview of Praveen Sir with CCI]
CA Dr. Girish Ahuja (Taxation) - You can not gain accurate knowledge of tax until you start your articleship. [source: once I had personal chat with him]
Dinesh Madan (IT SM) - You can not understand IT unless you do your ITT. (ITT is considered wastage of time by many students) [source: his Book]
Some other:
CA. Mayank Jain (My friend's law faculty): I always found SFM most typical subject in CA Final. If you want good hands on SFM, you should join any firm and work on this field more.
CA Monu Jain (My cousin, who used to guide me during studies): ICAI has done a big mistake by withdrawing the rule of Articleship just after Foundation. According to him, he even can not imagine how someone can get knowledge of subject unless he works on it practically.
Me (sorry chota muh badi baat ): We are leaders and not learners. But before becoming leaders we need to know how Both (leaders and lerners) work.
Conclusion: Articleship is not for the benfit of ICAI, it is for our own benefit.
Rohit - Indian CA Helpers Blog