Sad that in 2022 an "entire gigabit connection" is still considered a lot of bandwidth, the statement would have sounded the same 10 years ago and only slightly out of the ordinary 20 years ago.
Yes, the ISPs have successfully shifted a lot of the usage away from a peer-to-peer internet to TV-like use cases, and a lot of people don't even miss the old capabilities.
People used to do a lot of file sharing for example over the internet without Dropbox like corporate choke points. And of cousre this article's subject, remote desktop usage, has been important for individual freedom of computing, to be able to eg use your home desktop/IT infra from work or travels.
Because some ISPs (like the monopoly over here) give you only about 3% of your download speed in upload. No, that figure is not off by an order of magnitude - I have 900Mbps download and only 25Mbps upload. That's less than 3%. And they don't offer 25Mbps upload for any cheaper.
While that is true, I really enjoy my 600/600 connection, because most downloads basically finish instantly (same with uploads).
However, I agree with your point, that it's not that useful when I only use the full connection a few minutes a month. Still, it was only an extra 5 € from 300/300, so I figured why not.