No, it's not understandable at all. It might be understandable to have an option to display descriptions or not, but not remove altogether. Frankly, Firefox was, for a long time, the only major privacy-respecting browser. Heck, Tor Browser is still built on FF. By only caring about "telemetry" (i.e. random information sharing without the user having the ability to audit data prior to any transmission), and not caring about providing the best and most robust privacy-focused feature set, Firefox is actively cutting off a major part of its old user base, telling them that Firefox is not the browser which they originally installed anymore. Now, if the description data was being stored in plaintext and that data was being leaked, by all means, say that outright so we know that the devs screwed up again, remove the dangerous function, leave the data to the user (that part really kills me, btw - Mozilla is trying to delete information from my PC without my explicit consent), and put it in roadmap to reimplement in a more privacy-driven way.
That means, do not reveal information to any server - and I mean any - if I have a server on my network, don't let my user settings leak there. Do not rely on an external, insecure, website to do what your browser should. And all websites are insecure - I am not the only person to deal with the server from bare metal up, that means there are twice as many security risks as there are abstractions from me plugging my computer directly into that computer.
If you want "telemetry", give me a button in my options menu to compile the report, in human-readable plaintext, and then, only after I approve it, ask me to send that text file through sFTP to a server I can log into with a one-time username and password, with 1024bit encryption minimum. I would be okay with sending a monthly report, after having confirmed that it does in fact contain no information whatsoever that could be used to deanonymize me. Anything more than once a month per user is extreme, and means that the devs are being overloaded with data so they don't have time to manually code.