If there’s any financial risk then it may not be worth the potential loss of control.
If your company trades at 100x sales you should probably sell the equity.
So, applied to GOOG, Alphabet Management is betting they will grow more than 4.5% per year at least until 2030.
There is also some weirdness, like Alphabet making a 500 million USD bet short term USD interest rates will be lower than 4% over the 2025-2028 period.