No, BULL brother is not quite right.
actually, what happened was..... illayaraja got so busy and it was almost impossible to approach him for new projects. there were many directors literally queuing in front of his house to fix an appointment! and at time, even prominent directors like mani ratnam, balachander had the same fate. and illayaraja didnt show any favour to those directors, they had to wait like any other directors. this irked them, (balachander, bharatiraaja, mani ratnam, etc) and that's the time ARR was introduced to mani ratnam and Roja was a phenomenal hit! so all the other big directors turned to him. avenggelukku illayaraja mele kaduppu. illayaravukku time ille, and as some say, yes, illayaraja is an arrogant man. but so what? sarekku irunthatan bantha kaatte mudiyum. aver oru isai nyani. there's nothing wrong if a genius is arrogant. he deserves that! after all he's not an ordinary composer.
but what the directors did is also not wrong. they cant be waiting for him forever! so they diverted their route to ARR. and the rest is history.
but enakku enna pidikkelenna, ARR vanthethum pothum, ellarum ottumothema illayaraje orenggattitangge. and they claimed that ARR is much better than IR. hmmm... kazhutheinggelukku teriyuma katpoore vasene? amitabh bachane averode padethukku IR'vode 80s' song'ethan remake panni pottuttu irukaru ippo. illayaraja oru isai nyani. athu isai nyanem ullevenggelukku mattumthan puriyum. nyaanesooniyenggelukku puriyathu.