Designing a system that vents hydrogen into the enclosure assuring an explosion and possible damage to the venting itself seems like a flawed strategy.
I notice you write "seems" which indicates you are not conclusive. Are you recommending ventilation of the gasses out of the containment building? Is that even practical in the situations encountered? Was the buildup a design issue or an operator choice or something in between?
I am not certain we know all the particulars at this time. Taking an action or not taking an action involves tradeoffs. To illustrate by way of devil's advocate: what if the gasses are radioactive, but the area around the building is evacuated? Personally I do not think I know enough to guess all the details that lead the operators there to do what they do and to be their back-seat driver.
I am reasonably certain that over time there will be analyses, investigations, design modification improvements, and new designs.