Yeah, if "tech" just means "many employees are programmers" or "has a large online presence" it seems obvious that tech is going to become a larger portion of t

Yeah, if "tech" just means "many employees are programmers" or "has a large online presence" it seems obvious that tech is going to become a larger portion of the market, and rebalancing to cut down the "overweight" tech in your portfolio runs directly counter to what passive cap-weighted investing is about -- having investments that follow what has won in the past and is expected to win in the future.