If a formal verbal subject cannot simply be moved ahead of the verb while keeping the same case function, it does not follow that a speaker cannot mention the person first to reinforce the attribution. A nominal construction can express that communicative purpose through a different syntactic arrangement.
For example, «زيد قام» places Zayd first and predicates rising of him, whereas «قام زيد» reports the same basic event in the order of a verbal sentence. In a suitable context the first may heighten the sense of attribution.
A grammatical restriction governs a particular syntactic analysis, not every rhetorical possibility.