Transaction costs for diversification. The same reason it makes sense to buy ETFs versus directly balance your own portfolio for anything below your first million.
In general, asking “why not X instead of Y” without giving reasons why X is preferable over Y is just a waste of everyone’s time.
There are some ways we could avoid some or all of it, but I was not considering a situation where you and I shared a primary residence, because we’d spend too much time arguing about taxation basics.
On the other hand, a REIT with more than the required number of members that distributes the required share of profits will pay no income taxes. Investors in the REIT, on the other hand, pay taxes on the dividends.