I tell my students you have an absolute right to write about people you know and love. You do. But the kicker is you have a responsibility to make the characters large enough that you will not have sinned against them.
When my opera Plump Jack was performed in 1989, my first piano teacher sent me something that I'd composed when I was four. I remember I played it, and it still sounded like me. I'm the same composer I was then.
If, as is natural, you focus on the corruption and on those threatened institutions that are trying to prevent change - even though they don't really know what they're trying to prevent - then you can get pessimistic.