Sure it is. As long as the toilet works when you need it, you (a) don't actually have to check, and (b) the plumber is free to sequence their tasks in an optimal fashion.
The message from the plumber is based on the assumption that the default state of things is that the plumber has not done their job and things don't work. If you feel like that's the default state of things, you should choose a different plumber, not ask for notifications about which things don't work.
The message from the plumber is based on the assumption that the default state of things is that the plumber has not done their job and things don't work. If you feel like that's the default state of things, you should choose a different plumber, not ask for notifications about which things don't work.