Rents can go up and tech companies’ stock can still go down (and boy they did, at the beginning of the millennium!).
That’s not an argument for buying local stocks - if anything, that’s an argument to buy real estate assets that provide a hedge against rising rent/property prices.
It may be the more popular alternative to the S&P 500 for Swiss retail investors - but I wouldn’t consider it a fairer comparison, quite the contrary.
Nasdaq 100 excludes the financial sector by design - whereas that’s the third biggest sector in the SMI.