Yep. My Dad in his late 70s uses this system and it works great for him.
People make fun of it, but for people with low tech literacy this is actually far better than having a mish-mash of solutions where some their logins end up automatically saved in iOS on their phone, some are saved in Chrome on the desktop, some are just in their head, they don’t know where anything is, and are constantly losing access and resetting credentials all the time.
And it definitely reduces the burden on me of parental tech support, when its all in the book.
I bought a refurb Pixel 7 on eBay for like ~$150 and put Graphene on it. It’s not like you have to spend four digits unless you want to.