Define “correct”. There is nothing under the law that prevents him from doing what he’s doing, or forces him to do otherwise, but that doesn’t make it right.
You can force the issue by providing a summary of the changes, in order of significance, to the committee and put a motion to their next meeting that it be issued to all owners before the general meeting required to approve them.
You could also propose a motion for your next general meeting that all by-law changes be discussed and decided individually, again adding your summary to the motion to go out with the agenda.
If you want to go hard-ball, propose a motion to your next strata committee meeting that the secretary be replaced in that role by another competent member of the committee (you’ll need someone to put their hand up) becasue of their failure to fully inform owners of the detail of the proposed by-law changes.