The author also doesn't control your life, quite the contrary the court wants to control the life of the author by forcing them to implement ways to move the game to another person/computer/account.
I think selling a computer where the game is installed to someone else is more akin to selling a book or a car or whatever and I doubt anyone would oppose that.
The author's problem are entirely self inflicted in this case, as it is his own DRM that is making him do extra work to allow transfers.
This is especially bad for the authors in case of content based product. If you are selling copies of knowledge you acquired then forcing you to allow reselling means you will have to sell for much higher price or not at all. There are opinions and verdicts of EU courts which makes different rules for content based electronic goods. For example you are not forced to grant refunds with those. I really hope Steam wins the appeal or that courts in other countries won't repeat this verdict (it's not case law in most of Europe so what French court decided hasn't much weight in Germany or Poland or whatever other country.