While this is true, there's still enough evidence pointing in that direction that it's still the more accepted hypothesis over alternate ideas, as far as I know.
"There is a sound theoretical rationale supporting a potential role for EIMD in the hypertrophic response. Although it appears that muscle growth can occur in the relative absence of muscle damage, potential mechanisms exist whereby EIMD may enhance the accretion of muscle proteins including the release of inflammatory agents, activation of satellite cells, and upregulation of IGF-1 system, or at least set in motion the signaling pathways that lead to hypertrophy. Although research suggests that eccentric exercise has greater hypertophic effects compared with other types of actions, a cause-effect relationship directly linking these gains to EIMD is yet to be established."