Because it’s easier, and is more likely to “just work” using only the GUI. That makes it more accessible to people new to it, and as it is perfectly capable once you’re no longer new to it there isn’t much incentive to move away.

Same reason many people choose iPhones, they can just turn it on and use it without thinking or needing to configure it. Meanwhile those with more knowledge who might actively be looking for customisation may prefer another option.