It may not help grandma as much as someone who maintains some popular opensource library that you may happen to use or someone that puts parts of their savings into crypto.

Who is more likely to visit this page (and use tools like pass) is up for you to decide.

The point still stands. Storing passwords and 2fa secrets inside in the same box will weaken the 2 in 2fa.

(Gmail's main target is not devs, or even computer literate people. And owning a smart phone =! literate.)

Grandma can always print the 2fa seed or write down the alphanumeric value and store it not next to the sheet with her passwords – same principle (I think she won't use pass anyway as opposed to the person I was originally replying to which tells me they are most likely technically literate).

Grandmas usually don't set up two-factor authentication in the first place.

Google will leave grandmas no choice.