Been told I need 0.5mm of IPR between upper teeth, this seems a lot? Worried the gaps won’t close up again. Can someone help?

I have just had my ClinCheck results. I only need 14 aligners just for my upper teeth. I wasn’t expecting to need much IPR if any, so to hear I need it between 5 different teeth at the maximum amount of 0.5mm I am concerned this is too much and I worry the gaps won’t close up in the space of 14 aligners.