Glad to hear you're okay. As other have said, anytime you can walk away from
ANY motorcycle accident you're lucky. Now you created a lot of that luck yourself by wearing the right gear, it's a great idea to offer the pics, etc to MSF to help people "see" the importance of proper gear.
As for HOV, they initial goal behind HOV lanes was (at least) 2 fold - lower emissions and decrease the "volume" of traffic. And arguably motorcycles do both.
According to this
NHTSA link, all states allow motorcycles to use HOV lanes. It also discusses lane splitting.