A classification on MSCI dilution fears over SPCX. What's it?

There are already confirmed fast-track inclusion reports in the MSCI World, and special rules have been changed for this purpose, e.g. here: https://www.cash.ch/news/top-news/msci-chef-spacex-winkt-nach-borsengang-schnelle-aufnahme-in-indizes-941343 But does this dilute the ETF, as feared? Let's imagine: the iShares Core MSCI World has a capitalization of all included companies of around $90 (European) trillion [see edit]. Musk has “only” promised 5% for the public market