I agree with the author that jQuery was essential for the time. Abstracting away browser compatibility issues in the era of IE6 was a wonderful thing, for sure.
The problem is jQuery has no business being used today unless you have to maintain legacy code. Even then I would deprecate jQuery wherever possible. Using jQuery for a "quick and dirty" application today is just terrible and it sends the message to green devs that jQuery code slinging is a skill worth having.
If you like quick and dirty, just make sure you have a working Node.js environment and generate a simple project that supports Webpack or Parcel. You will get all the advantages of Babel and Polyfills (if you need them) with little to no effort.
jQuery has no value except for maintaining legacy code. jQuery was useful back in the day (and John Resig had the best solution), but I don't love it anymore. In fact, I have serious judgements of the devs that use it that should know better.
Edit: I should note that jQuery is bad because it has no state management and you cannot easily track side-effects. I would much rather see someone use something like Svelte and construct the functionality with modern best practices while keeping a very small footprint.