My father was also a piano tuner and had a workshop at the back.
With an electronic tuner and little training, maybe anyone could become a piano tuner, but there's still the need for experience and learning how and when to make fine adjustments.
After it was delivered, a piano tuner examined it and said it was beyond repair.
You can never expect a piano tuner to be entirely happy working with an electronic keyboard, but rarely have I felt so frustrated.
Secondly, on average, professional piano tuners fail to tune notes more accurately than about 8 cents.