SRS, I like Harris, and I totally agree with everything you said about her.

Looking at the campaign through the perspective of marketing (i.e. business management-speak) I think that Biden has a good chance of getting re-elected but to start up a whole new person as a potential successful candidate when Biden is currently doing a good job in the role (in my opinion, and in the polling results) is not a good marketing strategy.

I think that if Biden is re-elected then Harris stepping in, for whatever reason, is a good strategy but trying to get a woman elected, straight off the blocks, is not likely (in my opinion) due to ingrained beliefs that "a woman can't do the job". Not just male voters, but some female voters have that belief as well.