His argument passing is wrong but it sounds like you are saying that this:
my %hash = (
foo =>\&do_foo,
bar =>\&do_bar,
);
is wrong, (correct me if I'm misinterpreting your post) which I'm not sure where you find that in perlref as that works, even while using strict. To pass the arguments you can do this:
$hash{foo}->('foo','bar','baz');
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