How to prioritize app installation sources?

Questions
1

Privacy guides recommends the order of priority for app installation sources as following:
Obtainium > Aurora Store >> F-droid
(I’m only mentioning the ones I use)
But should I really go first to obtainium first? Might be just my ignorance talking, but it seems more susceptibile to problems with security. I used to use Fdroid as my main app store, then Aurora Store and then Obtainium for apps that took too long to update through F-droid, but just as I read the Privacy Guides recommendations I realised the problems with F-droid.

What do you guys think? How do u guys prioritise your apps installation sources or app stores?

3

Why do you say so?

I prefer Obtainium because you can very the links through which you want the apps download. Also, its all FOSS and you’re in control over everything/how and where you get your apps.