To get back to brachos kriyas shema, since the brachos are part of the kiyum of kriyas shema itself, it is critical according to R’ Chaim to daven the brachos of kriyas shema with shema in its proper time, even if that means davening alone without a minyan. I usually daven at an 8:30 Shabbos minyan, and for the 2 or 3 weeks of the year that this is not early enough to make zman kriyas shema we will start a few minutes earlier. If you daven at 9:00, then you will not make zman kriyas shema I think about 85% of the time (e.g. this week the last time for shema was 9:09). Most shules simply announce that shema should be recited before davening, which only works if you do not accept R’ Chaim’s position.
I raise the issue because my son was invited to a bar mitzvah this past Shabbos where davening was scheduled to start at 8:45. I was unsure whether to tell him to daven earlier or not – do I have to impose R’ Chaim Brisker’s opinion on him because our minyan (and I) think it correct even though the majority of minyanim are either ignorant of the chiddush or follow other views and start later? L’ma’aseh, the question became moot because he knows this is what we do even if he does not understand the lomdus, so he got up early to daven at a hashkama minyan and then went over to the bar mitzvah. But the same issue has come up in other contexts – does chinuch mean teaching kids what the majority of “frum” Jews do, or does it mean teaching the views in halacha one thinks are correct, even if they be chumros that others ignore (or kulos that others reject), and even if these practices will not be understood unless or until the child matures and looks into the topic for him/herself?