What if you're on the go and only have a phone available? I reckon this is intended for quick experiments, not in depth debugging.

Yeah that makes the most sense to me. I could see a full blown desktop style inspector being useful on a 11”+ tablet (which is really just a laptop sans keyboard) but it’d be too frustrating for extended usage on anything smaller.

Use an extension. It will work on any site. Example for iOS: https://apps.apple.com/us/app/web-inspector/id1584825745

because most people do not have a computer today. or only use them for school work.

your comment is out of touch with young demographics like someone looking at geocities in the 90s and saying "why don't they just run a dbaseIII guestbook in the mainframe and expose via telnet?" ...yeah, it's that bad :)

Oh! I really didn't realise (young?) people don't use computers even for developing purposes. I'm indeed out of touch

Yeah: it really is a different world now: kids--who absolutely should not be locked out of access to development tools--pretty universally only have access to phones and tables, or, at best, a highly locked-down Chromebook; but like, it goes much further than even that: even lawyers I work with--people who you'd think MUST have a full computer--sometimes only work on an iPad!! :(

They do. It's just one that's locked down and user-hostile, designed as a consumption device.