I would say the game already provides enough tools for dealing with this situation.
If you want a very small tightly controlled colony, set the military only flag. Yes, at that point you would need to provide your own transport for new colonists, but you’re also forced to provide your own OH’s anyhow. While you could argue that cuts it out of the trade network, at under 10m population it’s not generating a significant quantity of trade goods anyhow.
If you’re wanting a larger colony, once you reach the 10m population threshold you just set the stable or source flags to prevent the colony from taking additional population from other worlds. At that point the innate local infrastructure production is purely a positive. No matter what you’re using that world for you want that infrastructure built as it’s an overflow to allow the orbital population to continue breeding once it runs out of room in space.
Without that population relief valve you either have to ship in your own infrastructure, provide additional OH space that is intentionally left empty and unproductive to take on the new population before moving it out, or lose the population growth entirely.