It's not the size, it's a size to content/quality ratio. I'll happily download a 500GB game if it's got the content to match.
Uncompressed assets doesn't bring higher quality visuals or content, it's merely pure laziness or a scam to make people feel like they're getting more for the outrageous price games have gotten.
Wouldn't surprise me if it doesn't check the UTF-8 validity at all and just lets the apps get broken UTF-8 where most of the time nothing horrible happens. That or they just strip invalid characters.