Diluting the index entry rules, only devalues the index utility. When it becomes a bigger problem, other indices with higher quality controls will out compete the current ones and be used by asset managers seeking safety.
More likely than not, most of us are already holding stock in these companies one way or another. All the Mag 7 hold a major chunk of OAI and Anthropic stock anyway, slower entry does not make it less risky for us.
Even if the big tech companies did not hold any stock, they are still the biggest vendors and their own order books is hugely impacted by the AI demand from these two ( and others in this space), either way we are all in this together.