I hear you, but I also think tab completion is one of the basic amenities we should expect shell users to avail themselves of in 2021. And distro-makers can even pre-configure them for their users. I can understand why a distro maker might not be interested in accommodating users who don't want to use decent tab completion with smart casing.
Yes I agree, just playing devils advocate that you shouldn’t have to change off defaults for ergonomics when there isn’t a real _benefit_ to pascal case.
I agree that PascalCase makes more sense on systems like Windows, where everything is case-insensitive, or in shells like PowerShell, where virtually all commands are shell functions rather than separate binaries, and the shell itself is case-insensitive. Then, I suppose you get some legibility benefit, without any extra hassle.
I'm personally still on the fence about the more verbose style. I think I like it for directory names but not really for executable names.