No they can't. Sorry. 2020 is an anomaly and while I agree with your premise that they can "go bowling every year", 9-10 wins 2-3 times per decade is the ceiling in my opinion.
The Big Ten East will rebound and the Hoosiers will be lucky to get one of the big three (OSU, Michigan, PSU) annually. To get to 10 wins that means running the table. 9 means they have room for one more slip up.
Make no mistake, what Allen has done this year is amazing but 2020 is the exception, and not the rule.