Why is it advised to use retinoids days after microneedling?

I have been researching on microneedling and have come up with doctors, here on Realself, suggesting that they recommend holding off the use of retinoids (tretinoin, adapalene, and tazarotene) at least 3 to 5, some even say 7 days, after having a deep microneedling treatment. What is the reasoning behind this? Is it just because it is more irritating? Is it because it is toxic? Or is it something else like the retinoids will prevent the skin from healing properly etc.?