InDesign can’t downsample the images to 72 ppi, but you could do that with a batch in Photoshop perhaps. So you could have a low-res images folder and a high-res images folder. Then you could use the Relink to Folder feature in the Links panel to switch between them (as long as the file names were the same).
See: https://creativepro.com/relink-from-one-image-file-type-to-another.php