Your comments are really timely given the recent publication of a scientific paper where the researchers created a functional polio virus from published gene sequences. The publication was misguided and alot like publishing nuclear weapon blueprints. Our National Academy of Sciences should have had more insight.
Your concern that a vaccine may not function well against bioweapons is valid, but it is wiser to vaccinate against known viruses than to simply ignore the threat.
Probably a lot worse.