Here's the thing about opposing "forced busing"

[StarfishSaver]

13. Here's her position as I heard it

Biden opposed busing in the 1970s and she asked him if he thinks he was wrong, noting that this was very personal to her because she was one of the students who benefitted from busing.

He said that he didn't oppose busing, just busing "'court-ordered busing" but he didn't opposed voluntary busing programs like the one she participated in. He said that it was wrong for the federal government to in local decisions on these issues. She pointed out that it there are times when the federal government must step in when local governments fail to protect follow the law and require them to comply, listing the Voting Rights Act, Civil Rights Act as examples.

Based on this, it's clear that she's not in any way suggesting that busing should be used today or that it is even an issue in 2019 - any more than talking about his Iraq War vote would be an effort to argue that we should engage in a war in Iraq today. The issue is whether Biden is willing to reconsider his position on state's rights and whether he still believes that the federal government shouldn't ever step in and require local governments to protect people's rights when local governments refuse to do so.