To be clearer, i have no idea about r. Grossmans personal hashkofos or level of learning – could be he’s on those platforms to provide a daas torah that is missing (to say the least), and that he’s actually a talmid chacham and totally ehrlich – but his audience is not the yeshiva world, so that article may not be a fair representation of how he actually thinks.
If it’s to be taken on face value, it’s not an article representing the yeshivos, as it quotes the OU and aharon Lichtenstein, neither of which matter in the yeshiva world.