In Woocommerce, I changed the Settings | Products | Downloadable Products | File download method — from Force Downloads to Redirect only. The Redirect does not change the shareable link name to the Google Drive file, and as you pointed out, the link can be shared with the whole world.
That works for me because my products are free; however, that might not work if products are not free or need more protection.
What this means is the Force Downloads method was not working for me.
Thank you for your response.
