Funds are attractive to some purely for the easy button effect. Like art, funds can be awesome and great, or more of a blob of colors used to obfuscate what underlies it.
I am not against funds and actually have some private funds in the portfolio.Fund paperwork can give sponsors a lot of free reign, so it can good or bad, depending on one's plan. For some investors, it is a perfect fit of easy, like buying a stock.
Easy to be set-it-and-forget-it.
Easy on the paperwork volume.
Easy to invest once and get multiple asset diversification.
Easy to also get complacent as investor, and worse, as sponsor.
Easy to get information lost in layers of aggregated data.
Easy for managers to tweak standards when pressure to put idle fund assets to work.
Easy to get invested into cities and states not originally intended to invest in, or not desired at all.
Easier to cloud NAV calc (e.g management fee not taken from cash and instead taken by diluting the NAV).
Easy to look a lot more like wall street vs RE.
Easier to generate more fee income with less net work.
Easier to be tempted to pay distributions not from income. One of the biggest fears of some.
Easy to do a lot of things. Some very good for all parties, some not so much.
For the investor side, it all depends on one's risk tolerance, goals, due diligence effort level desired, trust, and how freely one lets another invest your funds however (almost) the other party likes; constrained usually only by a loose set of paperwork. If the investor runs from Wallstreet, REITs etc, then some funds are maybe too similar for comfort. The inverse investor would love it.
For the manager, funds can bring flexibility, scalability, more income, more investors, more options on everything; maybe more pressure, scrutiny (not a bad thing) etc.