Everything in that last paragraph is a case against Trump -- to which he makes the case "for" her by saying that, unlike Trump, she's normal.
The problem (for me) with this view is that, while it's true she's not Trump and that this is a good thing, it's also true that she is advocating bad policies. It's fine to believe that her genuine intention is the betterment of society -- I would hope her supporters believe that, anyway. But, to me, (a) her intention doesn't matter, and (b) the outcome on society were these policies to go into effect would not be betterment.
In other words, her being not Trump doesn't suddenly make her agenda a positive thing for the country. Taxing unrealized capital gains is not a beneficial policy, even if the person proposing it is not a lunatic like Trump. Making people who have paid the bills they've amassed also pay the bills of people who have not paid the bills they've amassed is not a beneficial policy. It's a terrible idea, for numerous reasons.
I think it's telling that some of the cases being made for Harris are largely, if not entirely, just pointing out that Donald Trump is a loose cannon and she's not. It's not the first time I've seen something like this.