Link input without URI scheme should be completed with HTTPS by default

[porg]

Reproduction

1. Select an element which supports a hyperlink, e.g. text in a paragraph.
2. Press the link button or shortcut (⌘ K)
3. Into the text field "Search or type url" type or paste an URL without the URI scheme at the beginning, e.g. "example.com/page"
4. Press ENTER to confirm and close the dialog.

Actual

• Upon inspection you see that the link was created with http:// prepended.

Expected

• In this day and age the auto completion should default to https://

HTTPS as the default scheme? Arguments pro (✅) or against (❌) or uncertain (ℹ️)

• ✅ The majority of websites moved to HTTPS.
• ❌ Most HTTPS websites have set up HTTP to HTTPS redirections, so most users will get to their destinations anyways.
• ✅ But that redirection means longer wait times to reach the destination, instead of a correct HTTPS on first try.
• ❌❌ Falsely using HTTPS for a page that is HTTP only fails totally.
  • The user has to realize this and manually correct in the address bar. Some users will fail here.
• ℹ️ I do not know if it has negative/punishing SEO implications on your website if your outgoing links use predominantly HTTP (for destinations which actually are available as HTTPS).

My preliminary conclusion (no CMS or SEO or W3C expert at all)

• Overally it seems that defaulting to HTTP is safer, but nevertheless it kinda feels wrong in this day and age.
• You experts decide. It's just something that came to my attention.

[jordesign]

I see this has been resolved for adding links to the buttons block specifically (in #46385).

@eoinsav @getdave is there any way the work from that could be brought in to impact here more broadly?

[getdave]

Yes it could be done.

[porg]

• When your start this, then please also check this URL-scheme auto-completion bug:
  Image blocks with www links append the site's base URL to the link.  #35910

[WDWNT-Frank]

Just wondering but is anything being done on this? It's still n issue and not resolved in any way.