Not what I said at all.
I said if I turn it off it is up to me to turn it back on.
I can certainly see that side of it, especially if I am the only trade on the job. It not clear if the wiring move was a one day job or disconnect and reconnect at a later date.
If the electrician does not have his own hot tub and is not informed or instructed by the owner regarding the special freeze or winter protection of the equipment, it is easy to see how it could go unnoticed. For assignment of liability, it's a grey area that IMO, can be obfuscated, which most parties will do when they have to pay. I am responsible for the wiring of the equipment but not startup or freeze protection.
You would certainly know that with other trades equipment and other trades on the job you would probably never start up someone else's equipment for new installs or new installs of used equipment. The stuff would blow up or break itself routinely. There are so many variables in the other trades equipment, refrigeration needs the evaporator fan running and right gas pressure, shipping blocks in fans and blowers, sheave adjustments on belt drives, programming ...
I wired this large air turbine air compressor, probably 30 hp, bumped it for rotation, and turned it off at the disconnect and told them to have their mechanical start up check it out. I left them with the caveat that the unit had 12,000+ hours on it. They turned it on and it blew up after a few hours. They knew it could fail and had mounted it up high away from people. The radiator fan did not work and it blew the oil all over the place.. They wanted to blame me but I had covered myself. I told them to get mechanical start up from the guy that sold it to them and the unit looked to be beyond the expected useful life. They did not like that I had done the hazard analysis prior and happened to inform them of something they could have caught prior.
Something similar happened in the last week. I told them to test it on the bench and not at the customer's site on their high available fault current bus. They skated past that but it did not work, did not fail catastrophically. It had a problem that could have been caught while it was on the bench.
It is because of stuff like this that the general rule would be I would turn off or lock off the power disconnect and *never* start up other trades equipment. Even in scheduled shutdowns I would routinely request onsite presence of other trades for their equipment, HVAC guys, building engineers, for them to turn off and turn back on their equipment. The operation of the equipment is beyond the scope of the wiring. The general rule would be I leave the disconnect off for the other trade to start up and checkout their equipment.