Earlier quoted context omitted.
Yes. The entity that does the data mining is the same across all “smart” product lines.
I've been asked "what's the danger of having Samsung datamine my washing machine/dryer/dishwasher". And, unlike say internet viewing habits, it's difficult developing an appropriate threat model. Anything/any ideas I can use to explain to them
So yeah I agree with your friends that data mining your dishwasher in itself is rather innocuous, but why allow it to happen altogether and open yourself to all the above?