Geez where to even begin with this. First off i wasnt sugggesting the op put all their money into funds. The point of a fund isnt to pad the wallet of a fund company, its to pay for professional mgmt, avoid broker trading fees, and not put all your money into a single stock or purchasing a bond and holding it until its maturity or its called, which helps create a smoother growth curve. Not sure which fly by night funds youre looking at but going with someone like blackrock, jpmorgan, vanguard or even american funds would be fine. If you read the summary prospectus you should easily understand the goal of the fund, if you want to dig deeper for full transparency and to see whats held in the fund read a little more into it and you can see how the fund runs.
Theres no good or bad age for someone to get into a mutual fund, seeing as that most employer sponsored retirement plans are funds. As far as dealing with an advisor one on one they could be gone in 5-10 years so youre not much better off there, plus they usually have account minimums to work with a managed account, usually somewhere around 50k and up, or youre stuck dealing with a call center in which nobodys managing your portfolio. Of course liquidity is an issue, t+3, but mutual funds are not meant to be day traded.
Most normal people build and maintain wealth through mfs so i cant agree with you there, again nobody was talking about getting rich quick/overnight. id love to discuss this more with you in depth if youd like to continue just pm me.