There are no advantages. I don't need anyone controlling my destiny AND charging me for it in the process. I can make more money on my own and not be punished for it. Only scary nikkas who don't trust their decision making need an account that they ignore for 30 years. You can do that with any brokerage.
Keep thinking that.
My wife for example when she was working - she maxes out yearly 401k contributions at 18k and it reduces her taxable income and then company matches which is like 6k a year.
And I picked her vanguard funds which has a dirt cheap expense ratio.
She would be foolish to turn down the company match and reduce taxes.