I'm guessing this is worse due to the super high valuations of these companies? Mag7 make up like 1/3 of the S&P 500. Even if you buy a low cost index fund with the goal of diversification, your portfolio still includes a lot of this stuff.
Value funds. If you buy stocks that make, like, actual profits, your exposure to AI "tech" is low.
Market neutral index fund investment can not be accurately described as fueling a bubble, though. You're neither bullish nor bearish on Mag7 in particular.