I don't have Goggle Play Services installed on my phone and am not going to do so. I understand why companies want their apps in the "Store" for discovery purp

I don't have Goggle Play Services installed on my phone and am not going to do so. I understand why companies want their apps in the "Store" for discovery purposes. However, I don't understand why they won't provide an alternative direct download. I do have F-Droid installed, but I appreciate companies may not want to open source their app. No problem, but I also won't be forced to install Google Play just to obtain it.