That's why the title said "transitional" because we are not looking for the next legend that will be here forever. Times have changed. The next hire will be here 1 year or 5...but in house or not, the next hire is critical.
Having a successful transitional hire for 2-3 years make sense to get out from JB's big shadow. Hiring from inside will most like be more of the same, hiring from the outside will create a rift especially if the new hire decides to clean house and bring in his own staff. Pitino is special in that regard because he is under the JB tree, and he is a JB friend. That counts for something. For sure he will not be affected by the JB shadow and he will get things moving in the right direction. He is also older so 2-3 years he will be ready to hang it up where he started his career.
On his past issues. The cheating is between him and his wife, personal stuff, none of our business. The stripper and the payment during recruiting, are issues, and I like to think that with NIL making some payment legitimate may lessen the chance of that happening again, and it's not like this is not being done by everyone else.