I think this maybe the eventual future, but this will probably not happen during our working lifetime. At almost fifty I have another fifteen years or so before I can retire and I think it will take over twenty years to go to where machines are starting to really displace most of the workforce.
And I think physical professions such as plumbers will be one of the first displaced by robotics. Machines are already really good at finding ways to deal with all kinds of exceptions and rules, just think Splinterlands bots, humans cannot beat those... But machines are not great at imagination so far and creative thinking, but with time even that would go...
I am not so sure about that. I think it might happen a bit faster. But even if it does take twenty years and you are retired, does that make you safe? The world will be a very different place if 50% of people are unemployed and hungry. So will retirement funds, investments and rent returns.
Maybe at some point. But I suspect that it might not be worth making a toilet fixing robot who climbs behind cisterns in old houses for a while. But as said, the designs will change.