The advice to "treat yourself to a food tour on the first day while waiting for your room" is a solid suggestion. I’ve enjoyed food tours myself, though usually in the evenings once I’ve checked in and settled into my room or the next day. Similarly, the tip to "take a photo at the end of the trip of stuff you packed but never used" is useful for one who tends to overpack and needs a visual reality check.
But the whole list of travel tips strikes me as a list of "what-ifs", and what one packs is, by its very nature, a what-if.
Every single item in your bag is a calculated gamble. You are attempting to predict the future. You are guessing whether the weather either will or won't drop twenty degrees, and how many pairs of trousers you'll actually need to cover a coffee spill or wardrobe change. Eve the number of underwear you pack is a "what-if" gamble based on the assumption that everything will run smoothly.
The problem I see isn’t that people pack what-ifs. It's that travel pundits draw an arbitrary, preachy line between "smart" what-ifs and "stupid" what-ifs. A pundit will confidently tell you that packing an umbrella is an amateur mistake, but then turn around and declare it a genius hack to pack dollar-store tea candles just in case a room is too dark. They are both what-ifs, and one isn't inherently smarter than the other.
Packing tea lights, snacks, umbrellas, or sheet masks is just a different kind of gamble. It’s an either do it or don't kind of thing, so just make your choice, embrace it, and why worry about what anyone else thinks?