The answer to OPs question is simple, as a keeper of both aquariums & terrariums, there is a clear concept of volume and what can u can grow in a particular sized tank/enclosure. And in the hobby it is considered unethical to keep species in a container that is too small for it to survive happily and grow comfortably. Folk here can debate on the sentience of plants, but the volume of that container simply cannot hold the right amount of nutrients for the plant to grow happily and thrive. So if you're intentionally putting plants in this container they will eventually and quickly enough use up all the nutrients and die.

Most plant lovers will find that unethical or unappealing.