If you talk about any activity you undertake daily on or offline seriously with a lawyer, you will become so scared you'll want to stop doing it. Even the legal ramifications of walking your dog will make your head spin.
The lawer in the linked post has an incomplete understanding of copyright law, especially in regards to the fair use doctrine and the DMCA, and indemnity as it is practiced in most of this country.
Far more important, not all judges are good judges, and hardly any jurors are good jurors.
Hence the (correct) advice to "Be afraid."
And due to the chilling effects, only criminals and crazy people even dare to do anything anymore. Others listen to the advice to "be afraid" and sit cowering in their homes.