It increases the value for that one person who uses the wheelbarrow sure, but it does not raise the value of labour in aggregate. The same would be true of AI tools.
Taken to the extreme, you're arguing that tools have only lowered the value of labor in aggregate and that seems obviously false.
The value of labor is dependent on the demand of that labor and tools increase demand by increasing what projects can be done.
Taken to the extreme, you're arguing that tools have only lowered the value of labor in aggregate and that seems obviously false.
The value of labor is dependent on the demand of that labor and tools increase demand by increasing what projects can be done.