It might reflect a prejudice of modern human society to think more highly of people who are intelligent, and think less of people who we deem stupid.
I'd say AI should not by default gain any social status as human-equivalent even if they become (in whatever regard) more intelligent than humans. But that would require us to drop the notion that intelligence ~= respectability/status/ability to have a full subjective experience.
Most of these kind of pseudo-philosophical controversies actually tell more about the issues with humanity than the new tech/stuff...
Since when has intelligence had a strong relationship to status and respectability? I've met intelligent people that don't get much respect or status either because they don't look good, are shy or they don't have money.