Enable Blog, Wiki, and Landing Page Hosting as a Subdirectory

We are currently using the blog, wiki, and landing page functionalities from Hubspot on different Subdomains. Our subdomains each have specific aspects for which they rank well.
However, our main website does not get the benefit of this authority on certain topics.

Therefore, we would like to restructure our assets from a subdomain into a subdirectory structure.
This is an ongoing debate between SEO experts, but as a paying user for many Hubspot features, I think we should at least have the ability to choose our own strategy.