Your opinion has been noted. But perl doesn't care about your opinion, and will treat the keywords for and foreach to be the same. I'm just answering the interview questions - and I think that the interview is about probing my perl knowledge, and what I know about the opinion of some well known members of the Perl community.
The question was "What is the difference between for and foreach?" not "What is the difference between the keywordsfor and foreach?" - it could also mean "What are the differences between the for and foreach loops?" (of which there are several notable differences which perl does not treat the same)
It's an ambiguous question that should be followed by another question to determine whether it is about the keywords or the loops.
This post has too many branches :)
-------------- "But what of all those sweet words you spoke in private?"
"Oh that's just what we call pillow talk, baby, that's all."