So Ravina and Rav Ashi just had the words of the gemara they recorded
If they had more to say, why didn’t they?
Rav Chaim said about the nosei keilim on the Rambam that the Rambam never meant most of the chidushim that they say in the rambam’s name. No difference here. (Yes, I know that R’ Chaim also said that the nosei keilim still count as torah. If you could explain that line to me, I would be very happy.) Either way, just becasue the chidushim count as torah, does not mean that it is the best use of one’s time to study that type of torah.
How should bekius (at least your understanding) be taught ? You just sit and read! And use basic skills you already have. Iyun needs training.
So you are saying that we should design the curriculum of the yeshivas based on the fact that rebbeim will have no job? Not a primary concern.
If you learn (and even chazer) the daf for and hour or two day, would you be ready to be tested on Shas ?
No. That’s why I would do it WAY more than 2 hours a day.