Maybe we send and receive different types of mail. I frequently have things that I want to send. Let's take an example.
I've just found an interesting paper produced by a university. This paper can be found at https://ee.engineering.someuniversity.ac.uk/ce/2018/~efermi/archives/2016/rgaaf-pg15-38.pdf
I want to tell my colleague about this because it has something relevant in it. How should I do it. I could include the URL, but evidently, that makes me bad at communication. So maybe I should give them the last search string I used to find this from a search engine. Except that search string is confusing because I was using it to replace the absent or malfunctioning search box on the university's site, so it has a site: filter and a few words that look like I just picked them out of a bag. Also, I used DuckDuckGo and they're using Google, so their results might be different. So I tell them to go to DDG, enter this search string, select result number 5, and oh right, this PDF was not what result number 5 links to. Result number 5 links to a personal page from graduate student R Feynman who worked on a paper about something else with professor Teller. I'm not interested in that, but fortunately, Feynman mentioned when linking to Teller that Teller also works on the kind of thing I'm interested in, so I click on that link and go to a page that Teller wrote. Only there do I find the link to a different paper that Teller wrote with Professor Fermi, which is why the PDF is under Professor Fermi who I hadn't heard about before. So maybe giving a search term isn't the best option.
So instead of that, maybe I should take the link I have and see if I can find a path back to the university's home page. If I'm lucky, I may be able to tell my colleague to navigate to the home page of Some University, and if they don't know that they can always google it, then find the link to the engineering departments, then the twenty more links needed to arrive at this professor's page. So that is not much better and there's a decent chance they'll take a wrong turning and end up at the wrong URL entirely.
If I have somewhere that I want someone else to go, a URL is the way to ensure they arrive there and not somewhere else. This is why, when I tell people to download something, I always make sure to give as clear a URL as possible and never give them a search string. Frequently, when I have used other methods, bad things happen. For example, they Googled something, clicked on an ad that I didn't see because I block them, and ended up in some sketchy site that's more than happy to provide them software downloads, just not the software download I told them to use.