Uh, no.

That will match every string, because "bar" 0 times is the empty string, and every input matches the empty string.

laptop:~> perl -le 'print "matches" if "bar" =~ /(bar){0}/;'
matches
laptop:~> perl -le 'print "also matches" if "barbar" =~ /(bar){0}/;'
also matches
laptop:~> perl -le 'print "event this matches" if "" =~ /(bar){0}/;'
event this matches
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