Is instacart going to find the exact brand of kombucha you want and be able to substitute it when it's gone? Will they put it in your fridge for you and leave one out on your desk?
An EA/PA is low touch and avoids all the context switching. They're a dependable person you have a working relationship with rather than hit or miss gig for hire.
A service will always be a worse experience. A real human being can mod you and make time for you (this is what you pay them for). To a service, you are a number that the bare minimum is done for to ensure your money comes in.
True, I already have a cleaning service. They come every two weeks and clean the house. Honestly, I'm not satisfied with instacart and all the hidden fees they have/had (last time I used). What is interesting about an individual is they will learn your preferences and have more context in ones preferences as time goes.
An EA/PA is low touch and avoids all the context switching. They're a dependable person you have a working relationship with rather than hit or miss gig for hire.