Usually it’s because they have a distribution deal with a local TV station in that country where the deal prohibits them from distributing it themselves. The local station wants you to watch it on their own streaming service. That would also explain why it’s mostly English-speaking countries since nowhere else would carry an English-centric news show like this.
Some things make more sense with additional context. Like, Europe was on the PAL standard while Japan was on NTSC, so even if you put them both in the same region, they couldn’t watch each other’s discs, so the region code could be re-used without it actually conflicting.