The Idf does not represent klal Yisroel making a mishebeirach for them in Shul would give off the false notion that they represent klal Yisroel. They don’t, they represent medinas Yisroel.
Brachos and segulos are shortcuts all the brachos lie in the Torah to one who fulfills it’s dictates. the Torah speaks about shabbos as memory habracha so someone who increases his shemiras shabbos will merit Bracha by default, it’s mimeyla and therefore no Bracha is necessary and that’s why it’s shtusim and kindershpiel this is what I feel the brisker rav meant