Thanks again AL123al!
I would be concerned about my internal linking because of this problem. I've always wanted to keep important pages within 3 clicks of the Homepage. My worry here is that while these products can get clicked by a user within 3 clicks of the Homepage, they're blocked to Googlebot.
So the product URLS are only getting crawled in the sitemap, which would be hugely ineffcient? So I think I have to decide whether opening up these pages will improve my linking structure for Google to crawl the product pages, but is that important than increasing the amount of pages it's able to crawl and wasting crawl budget?