When you set a console to your “home console” every single user on that console will have access to your games and will have PS+.
The limitation is you can only have one “home console” set at a time. If your “home console” is at a friends house everyone there can play your games on and offline.
If someone else goes to your house and tries to play a game on your console, it will tell them something to the effect of “you do not have access to this game. Please sign in as the correct user”.
If I recall correctly, to change your home console, you have to log into that ps5, disable it as your home console, and then assign a new one.
If you’re concerned about people buying games under your account just enable a password and 2 factor on your purchasing.
In the digital world, you essentially get 2 copies of every game for the price of one of you want to share.
Okay, I got it.