Flickr and Instagram were pretty different.

Flickr incentivized uploading a lot of photos with metadata and was highly searchable. It was great for photo hobbyists building a personal archive for others to peruse.

Instagram was for smartphone photos and playing with filters to set a vibe, and ephemeral sharing with friends and people you wanted to impress. It’s hardly searchable at all.

It sounds like an Instagram style app, with Flickr as the backend would be ideal. People could still share for fun from their phones, while actually being able to find and organize old photos, if they wish.

You can do something like that but it must be an Open Web project. Walled gardens only care about themselves and their ad revenue.