[amitagarwal]

Unfortunately, that's how the Google File picker works. It needs permission to read files from Google Drive even if you are looking for a specific Mime Type (Google Slides in this case)

[tehlike]

Why not make it an add on, then?

[amitagarwal]

That is likely the next step. Addon take more time for approval.

[tehlike]

Good luck, keep up the good work!