Very likely because they don't want people to rely on the sat count, and they'd be right about it because it's a basic but very poor indication of positioning quality. It's HDOP/VDOP that matter, and that's likely what the bars show.
You can get as good a position with 6 sats as with 15, and have poor position with 9.
I remember in the days where I helped develop an OSD, we were initially based on sat count for home point setting but had to switch to HDOP simply because it's not because you have 10 sats that your position estimation is good... it might take another 30 seconds or so from the time you lock to the sats until HDOP really drops. But it can also drop in a second, so you never know and is why the info is there.