From the perspective of a musical lover, I guess I'm just accustomed to the fact that shows like that are made to be experienced live. Filmed performances is a rarity when it comes to musical theatre. And when they do get filmed, it's often in different settings than the actual play. Like, there's a really good version of Phantom of the Opera out on blu-ray, but it's not the stage performance - it's a super extravagant royal albert hall performance. Same with Les Miserables - there's actually two different performances, one in the royal albert hall and one from the O2, neither of which are the stage performance, but rather a concert setup (typically the songs are just performed standing at a microphone instead of acted out).
Or they're specially made for TV productions - or even worse, proper film productions that bear little to no resemblance to the actual stage production.
Point is; the norm is actually to not film those types of productions.