Possibly but at the same time most people who will be using the terminal at all on Mac are the same people who have been using the terminal on linux. For people that have been using the terminal on linux Bash is more user friendly (it is what they already know).
By that logic, windows is more user friendly then OSX because it is what people already know.
Most of the stuff you would use in bash just works in fish as well, except that fish gives you nice help information when tabcompleting, a better command history that you can use filters on, colour feedback (red = invalid command, green is a-okay) and lots more.
Sure, some people will always stick to what they know, but that does not say as much about user friendliness as it does about resistance to change.
