The problem with naivete and idealism is that they actually rob you of agency and the ability to engage reality on reality's terms.
The most dangerous thing you can do is to try to immanentize the eschaton. Every time someone tries to straighten humanity by force, the crooked timber snaps, heads roll, and our understanding darkens.
So you have to be prudent about the changes you make. Idealists will always be disappointed by anyone who tells them that their vision, even if ostensibly good, is unachievable and its pursuit harmful.