Why is Apple’s market cap twice that of Alphabet?

Right now, Apple has a market cap of $2.62T and Alphabet $1.39. What is the logic behind these valuations?

If we look at Apple, they don’t make anything indispensable. Sure, losing my iPhone and Mac would suck pretty badly but there are decent to great alternatives and I’ll be fine.

Google, on the other hand, has services that are literally indispensable. YouTube and Google Search have no alternatives. Losing these services would change people’s lives for the worse.

What do you guys think?