I haven't found "this needs to be indented exactly the right amount or it won't work" to be much easier for non-programmers than "this needs to be enclosed in braces or it won't work." Most people have at least experienced parentheses in math (albeit maybe decades ago), so it's not an entirely foreign concept. Either one requires a bit of learning, but I think most people are capable of it, so any improvement in non-coder familiarity seems minor at best, vs. the very real costs.