In a word, Price. Blue ray disks are best viewed with HDTV's for
maximum picture clarity, this is expensive if you do not have one
already. On top of that, Blue Ray Disks are more expensive than
No, Blu-ray Burner is an external drive, through which you can play blu-ray discs, while blu-ray player is a software to play blu-ray files. Common blu-ray player like Macgo Blu-ray Player, VLC Media Player, and so on.
In order to play a blu-ray disc on your computer, please make sure your computer has a blu-ray drive working and installed, so it can play the blu-ray disc. Then download a blu-ray player software from the Internet that is compatible with your blu-ray drive such as Mac Blu-ray Player.