A web browser is not a computer. A phone is not a desktop computer. Google (and most other large companies) keep many features restricted to their full websites, not mobile apps and mobile versions of their sites. For those who are used to/grew up with smartphones, tablets, and chromebooks, these tactics help to make it harder to leave their ecosystems as they aren’t used to navigating desktop environments.
(Chromebooks do give desktop versions of websites by default, but they have helped reduce technological literacy in exchange for convenience)