Compare the user experience of exploring the suite of AI products from each company (OpenAI, Google, Anthropic, xAI, etc).
It is vastly more difficult to understand what Google is offering compared to the others, to what cost, getting an API-key or similar, understanding usage/billing across the suite, etc.
I wouldn't expect any regular person to bother signing up for any of Google's products, let alone understand what they're really offering.