Psychologically, the message needs to be changed. If you keep saying everything is status quo and we don't know when it will be different, people just stop listening.
Is that how Halacha works?
I don't know that he's wrong - its not about the halacha, its the method and delivery of the psak. You can tell your kids "no" in different ways and the method of delivery will impact on their acceptance and obedience.
However, he is not correct about the language of this statement by the Rabbanim. The message from the Rabbanim is not "status quo and we dont know when it will change" that was one sentence in the middle of the statement. The larger message was that although we all very much want minyanim, the Drs say its not safe and Pikuach Nefesh is above all.
Like most, I very much miss my shul. Other than travel related issues, I had not missed a shacharis with a minyan since my youngest was born 15 years ago. I was part of a regular nightly daf since 2005 (although that at least we do by phone conference 6 nights a week) and I lain a few times a week. I really miss being in shul.
But having said that, I understand and accept that my Rav and the other Rabbanim in Long Island know halacha and know what's best for the community. If they say no porch or basement minyanim, that's the psak.