The court is not an expert in most things really, that's why they call witnesses who are experts. It's a normal practice. I am guessing we would be in chaos pretty quickly if courts made important judgements based on no professional knowledge.
Yes but in the end the court makes the decision. It's unlikely that in the time allowed the final decision maker(s) could really understand enough about what was said by any party to really appreciate the technicalities. It's fine if it's an obvious contravention of safe working practice. But many cases will be far more complicated.