Question

Rabbi, lately I’ve had the feeling that in everything related to electricity on the Sabbath, the halakhic decisor does whatever he wants—that is, when it seems right to him, he can find a solution and say that with a rabbinic-level doubt one rules leniently, and when he doesn’t want to, he doesn’t use the tools to permit it. For example, Rabbi Melamed writes in Peninei Halakha regarding leaving a loudspeaker on for the entire Sabbath that there are several problems with it:
1. There are opinions that using a loudspeaker is forbidden because of the Sages’ decree not to produce sound with a special instrument designed for that purpose.
2. Its use looks like a weekday activity, and people may think it was turned on on the Sabbath.
The problem is that it seems as though first of all it is important to him to forbid the matter (maybe because it feels Reform), and only afterward to find halakhic reasons, because later on he says regarding a Sabbath elevator that there is a dispute on the subject and one rules leniently in a dispute because it is a rabbinic law (seemingly like our case in point 1). And regarding point 2, the feeling is that if they wanted to, they could find a solution (for example, put up a sign saying that this loudspeaker was turned on before the Sabbath, or something else). Those are just suggestions in the direction of a solution; the important point is that on this issue I feel I have no trust in the system, because it is easy for me to imagine that in another generation or two it will be accepted to use a loudspeaker on the Sabbath and they will find solutions for whatever needs solving, and the main reason it is forbidden today is the psychology of the halakhic decisors. What does the Rabbi think? Is it reasonable that regarding electricity there could be a substantial change many years from now without any change in unusual reasoning—simply because the psychology changed? (It doesn’t feel like there is some clear halakhic line here that would be hard to cross with a little goodwill…) In your opinion, is this whole discussion entirely on the halakhic plane with no prior bias on the part of the decisor, or is there bias, but that is okay because it is a kind of “halakhic intuitive judgment” that I, as a young man, cannot understand?
Thank you.