Rearing middle ground
Where is the middle ground then, in being able to contribute to the science and data (inside rearing), vs outside, where it's more natural habitat and rearing doesn't negatively impact their natural triggers and migration?
Generally, raise just a few every summer, and no more than you can easily take good care of. Raise them only for educational purposes or to contribute to citizen science. And if you are worried, don't raise monarchs from the final generation that should migrate (so they can get their natural cues to do so). If you can do it safely (without baking them in the sun) raise them outdoors. Otherwise, if indoors they should be exposed to natural light.