This (exclusive) news from Variety actually shows the color of what FTC is going to do with the exact quote in their letter to Hassan:
"Simons also pointed out the FTC has a “long history of consumer protection activities relating to the video game industry and children.”
“For example, at the request of the President and Congress starting in 1999, the FTC issued a series of reports on the extent to which the
movie, music, and video game industries
marketed violent entertainment to children. As the video game industry has rapidly evolved, we have remained vigilant for potential consumer protection issues, and we have continued outreach efforts to
self-regulatory bodies such as the Entertainment Software Rating Board
.”
Thursday’s letter comes in response to a letter sent by Hassan last month asking for an update on the status of the investigation, a time table, as well as proposed next steps"
https://variety.com/2019/gaming/news/ftc-plans-public-workshop-on-loot-boxes-wont-comment-on-legal-investigation-exclusive-1203146123/
Although not quoted by other journalists/blogs, FTC has actually clearly stated their instance... and self-regulatory bodies such as ESRB and they firmly refuted any criticism that they are not doing the right thing already.