E-comm agents -- are they real?

I feel like I don't "get" the whole idea of e-commerce agents. I've always struggled with: why do I need a personalized shopping agent to pick and buy stuff for me? (Can I really trust it to buy the right thing?)

The big question: is it something about me and my shopping behavior, or is this shared? Some discrete examples (and some thoughts/hesitations):

• Groceries -- for a while we've now been able to buy groceries with a (human) agent (e.g. via DoorDash). I haven't used it often. A few reasons: (a) it costs too much, (b) I don't trust the buyer (who is incentivized for speed) to pick the right produce, (c) I enjoy the "randomness" that comes in shopping in a store sometimes -- random things on sale, a fruit or item that catches your eye. We did buy DoorDash with Costco while we lived in New Haven, in part because Costco was 20 minutes away. 
• Travel -- the hard part about travel is not necessarily booking the tickets, but the coordination? I need to coordinate with my wife (and often other friends, family, etc.) to see if a given date works, if people can take the time off from work, etc. etc. Yes, booking flights and hotels is a pain, but it's not the key friction. Can the agent coordinate with friends and family and make them decide more quickly?
• Clothing -- in the past 10 years, I've shifted towards "slower" buying -- buying more expensive, quality pieces of clothing but knowing they will last a while. I'll look on Facebook marketplace, and pull the trigger only after a few weeks or months of mulling it in my head. ("If I still want it after 2 weeks, then I actually want it.") Can agents really help me? (And if it tries to suggest a new brand, ... can I really trust it?)
• Home commodities -- things like toilet paper can be re-ordered automatically via Amazon (I haven't done it, but my wife has ... so our household has (dumb) "agents" buying household commodities already). There's not a ton of differentiation in price or quality, and buying the brand name doesn't hurt the wallet (all smaller-ticket items).

It is very likely that I'm an old man who doesn't impulse buy enough things, and so I just don't get it. And some of these e-comm agent companies will undoubtedly be successful (there is a lot of money in ads and e-comm). But ... I still hesitate to believe that in 5 years, I will be using e-comm for all my purchasing. After all, I still like going into the store to feel materials, try things on, etc. -- the same as we used to do in department stores in the days of Sears and JC Penny!