Why so many bugs?

I’m new to not just arena but MTG as a whole, and have been pretty shocked by the number of bugs in the iOS app and even the website. I don’t want to disparage the dev team … but I don’t think I’ve seen anything like this in a game so widely consumed. I’m just wondering, does the business not invest heavily in this aspect of the ecosystem? I.e. are cards the money maker and therefore encouraged over app use? Or is it something else? I’d like to help in some way to make things more stable but won’t waste any energy if this is well known and not a priority.