If you asked them not to change the definition because "broadband" technically refers to how data is transferred (10gbit ethernet is not broadband, despite the speed, it is baseband) then ok, you can be cpt pedantic.
However this is just you lying. 4mbps is not "enough" for the modern Internet. Currently I find the breakpoint to be about 20mbps. That is the point after which normal users won't notice much, if any, improvement. As such, that is my baseline for recommendation to people. 10mbps is serviceable I guess, but is a pain for video streaming. 4mbps would be a real issue, even low bandwidth streams wouldn't work well.
The minimum needs to keep rising. We keep finding more to do with our net connections. These companies are just whiny because they don't want to have to roll out FTTH, they want to keep doing DSL and pretending like that works.
TFS mentions high quality video. You're not streaming high quality video with 10 or even 20Mbps.