Are you suggesting that Harris would have reeled in some of the most outrageous policies on this issue? She said no such thing so the reasonable assumption anyone would make is that it would be business as usual. Not talking about it is the problem.
She was accused of many things in bad faith, e.g. not being Black, being a Marxist, being a communist, and more. Spending time and effort to address every single one of these would have been tantamount to allowing her opponent to dictate her campaign.
https://en.wikipedia.org/wiki/Kamala_is_for_they/them
It was and is an important issue to a lot of voters and by ignoring it she let her opponent explain her position for her.