That’s largely true, but I’ve provided objective reasons why Pharo syntax is much simpler and easier than Python syntax.
It’s also true that a new language has to compete with the ecosystem of an existing language. That doesn’t mean it can’t win, as history has proven again and again. Java had no ecosystem when it came out in 1995 — look where it is today. Ditto for Python (1990) and Ruby (1995) and Go (2009).
Rust had no ecosystem when it came out in 2010, but it’s doing very well today.