Our current piano tuner has been coming for many years. We bought our grand in 1988 and he has always tuned it.
When he first came to our home, he asked me, "are you a banger?" I.e., someone who loves FFF I suppose. He seems to believe that banging drives pianos out of tune.
As another point related to forcible playing, Larry Fine describes one model of mid-sized grand in his "Piano Book" as follows: "Suitable as a family piano with moderate use, but not recommended for someone practicing Rachmaninoff concertos six hours a day." How does one interpret this? Possibly that very forcible playing of the piano can affect the tune. And it probably does not help the piano much mechanically, either.
That said, humidity is very critical, and likely is more of a factor than how one plays.
Some parts of the country, where there is high humidity and considerable fluctuation, like warm areas near the sea, for example, will make this issue more critical.
we live in the northern states, have central air conditioning and a humidity-controlled furnace. Our piano is not near any heating or cooling registers, and is not in the sun. We have had the piano almost 20 years. It holds tune well and we have no problems. We really would not need a damp chaser, I think.
Best to all--