Given that the laws of physics in our visible universe are very similar, it is not unlikely that (intelligent, tool-using) aliens posses the same basic features.
I was thinking of this, especially with my previous analogy of what if there was humanoid alien life on other planets that thought humanoid lifeon our planet was impossible, because they believed their
evolution was unique.
The problem or key is, whether life on other planets could take a similar path to develop fingers that can manipulate or develop tools.
No tools, you can't experiment with space travel, let alone build spaces ships.
However, convergent evolution is still a good possibility.