It would make sense, I admit. But the high-pitched sound is not agreeable to my ears. And I will have to explain a few things here. How does a harpsichord sound in its original set and setting? Great. But then, how does it sound today? In a modern house or apartment: horrible! Again, why? It is all a function of building materials used, and also the form and size of rooms.
First off, a harpsichord needs space to sound halfway good. Space means a room size like a hall, with a high ceiling. A normal room in a modern villa would restrict the sound, or compress it, with the result of a loss of resonance. Second, hard and inorganic materials must be avoided, as they raise the pitch of the instrument still more: thus, no tile floor, no uncovered windows, no low and cemented ceiling, but rather: a wooden floor (parquet) or a floor covered with a rug, not just under the instrument, but covering the entire floor, windows framed with lavish curtains, walls and the ceiling covered with wood, as it was the style in old-fashioned castle libraries.
Another argument very important to me is the mechanics of the keyboard. The harpsichord is plugged, the grand piano is hammered. When playing a harpsichord I cannot raise or lower the dynamics, it is all one big boring default! On a Steinway I have a huge range of dynamics that I can bring into the music, with great benefits as to its expressiveness. Because of the ‘repetitive’ mechanics of the grand piano, my play can ‘bounce back’ which even increases the vitality of the music that I am playing—while the harpsichord unduly restricts me here to a rather monotonous ‘midrange’ that I find uncreative and out of tune with out times.
These are by and large all my arguments against the harpsichord and for the modern grand piano, except that I forgot one. Even if I had a castle and a ‘library’ room for the harpsichord, I would still prefer the modern grand piano. Bach had a 7-Pedal Harpsichord which was the most modern at his lifetime. He did not contend himself with anything but the best and newest, and the same is true for Beethoven and Mozart after him. I believe that people who play today Beethoven only on a ‘Beethoven’ grand piano, or Bach only on a harpsichord, for that matter, are a bit out of place. I wonder if they have really once listened to a Steinway Grand, or have played one?