Since this is probably because you want to move contacts to another app like Mac Contacts,
It'e really easy to do this. Select them all, then drag and drop to a folder. Sort by kind because in addition to .vcf files, you will have .txt files for your groups. At that point, select all the .vcf files, drag and drop them onto the left side of the Mac Contacts page, and let it rip.
I copied over 2600 contacts this way. It is correct you can't export to .csv, but that is because Microsoft has actually made it easier.