... it's because it is. But you have to look at the year it was made - 1966. The top film at the box office that year was "The Bible", but the #3 movie was "Who's Afraid of Virginia Woolf?". So society and its values were definitely in transition, even in confusion.
The plot is centered on Georgy (Lynn Redgrave), a twenty-something working class British girl who is portrayed as overweight and plain when I think she is adorable. She's on a voyage of self-discovery, but ultimately finds that she's most fulfilled in service to others, in particular her roommate's infant child who is abandoned at birth, and whose care she enthusiastically takes up. This might have been a sweeter tale than it is if not for HOW Georgy manages to keep the child and support her, made especially puzzling by the closing rendition of the title song that infers that this is supposed to be a happy ending! To find out what she did you'll have to watch this yourself. This film was considered controversial for its time, dealing with promiscuity, abortion, hedonism, child abandonment, and classism.
This movie might have even had trouble being made in the US at the time, and it for sure had difficulty with some local TV station managers that considered it unsuitable even five years later. I know that in my hometown, Dallas, no TV station manager would air it as late as the early 70s. If you think that's odd, do realize that the local Dallas ABC affiliate wouldn't air NYPD Blue during its first season in the early 90s because station management considered it obscene!
If you do decide to watch it, remember it's definitely not a comedy though it has comic moments.
