No. At the end of the day, senility in the evening or not, on average Biden is a smarter person than Harris and more effective at getting things done. (That’s not a denigration of her - I’m sure that she’s a smart and at least relatively capable person, he’s just another level up and I’m not worried that, that’s going to totally fizzle away in the next 3 months).
There’s a small window of time to try and disaster proof some stuff. Biden is a better person and better positioned to do that.