Why not? Rohit Sharma can score one hundred and so is Shubman Gill. Both are capable of this. Then you have Virat Kohli who is capable of scoring a double hundred. Then you have Rahane , Jadeja who can easily score 60 to 70 runs on any given day.
It's strange that you still looking for rain when you have the best batting line up

India has a strong batting lineup; most batters can score hundreds and double hundreds. But we never know who will be able to score and who will end up with a golden duck. So far, Opening batters seem on a different mindset, and their target is to win the match. Look how they are batting now. The score is 41 runs from seven overs without losing wickets! Watching how long they can charge Aussie bowlers like ODI matches will be interesting. While I was writing, Shubman Gill walked to the pavilion.
Since this is the final match of the Test Championship, I guess Team India will try their best to win the match. I don't mind watching big shots in test matches. But, You have to play good balls accordingly. You don't have to hit every ball in a test match.
Shubman The main man is already back to pavilion, still many batsmen left india just need to play carefully to even bring this on a draw. If they'll play abruptly and carelessly things will be difficult for them.