There are many reasons for using Wowza to provide HLS streaming services compared to a generic web server. You've essentially listed them yourself, though to provide a few specifics; Wowza's HLS implementation includes robust DRM functionality, timed data events via ID3 tags, alternative audio tracks. More are listed
I would recommend reading our
Quick Start Guide which covers the concepts involved. For more detail around the HLS capabilities I'd suggest reading the
If you require more product information then please also considering contacting our sales team at
firstname.lastname@example.org who will be happy to help.