I do sincerely worry about insects being added as filler materials as time goes on. I have a shellfish allergy, and the same allergens that exist in the shells of shellfish also exist in most insects.
Proper labelling would seem to be a requirement anyways if they aggravate shellfish allergies, I think the concern is more "if this starts getting used in more foods my choices for food will shrink and I may no longer be able to eat the foods I like now".
It's definitely both. A lot of folks don't understand that insects and shellfish are similar, and I've yet to see "product may contain insect meal / aggravate shellfish allergies" on things that have crickets or are processed in facilities that handle insect meal. So, the FDA likely needs to catch up. But, it's also a cheap filler protein that's easily grown, and companies are cheap bastards, so it's going to slowly find its way in and push out more expensive protein options.