Personally I’m not keen on the current roboadvisors or funds, they charge % fees, which is awful for long term saving. To me that’s the gap - transparent low cost saving into your choice of ETF, not obfuscated saving products which charge % fees, which is a killer for growth in the long term.
A nice flat low fee like free trade with a choice of a few global ETFs would be far better for people starting out, and would be an introduction to more complex trading later via the freetrade app (if they wish).