Several reasons. The most important is that FB Group is reserved for musicians only. It’s for networking like Musician’s Network Ho Chi Minh City.
Secondly, Vietnam Sound System has a budget to advertise and promote bands and gigs. But we can’t spend our money on a FB Group – only on a FB Page. (That’s a FB rule).
Lastly, the Page is open to anyone to join and post. Did you do a show and have fans get awesome photos of video of you? Have your fans post them them on the page so we all can see !!!