SGS3 I-9300 Android 4.2 - why can't I disable these system apps?

Question

nb. I can disable them using 3rd party root apps without any discernible negative effects.

Are these networking protocols default? They seem to be harmless but everything I read about sit0 seems to suggest it's no longer used.

This looks like some serious networking issues to my layman's eye. Yes or no?

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I have 100s or 1000s of logcat messages where a request for Neighboring Cell IDs is denied. Is this some kind of worm attempt being blocked by policy?

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Answer 1

"Why" is not a question well suited for our site, as it probably is a speculative question and such off topic (see our [FAQ]). Although, a short technical explanation: The company building your ROM decided such.

"How can I disable them" would be better fitting, and even has answers:

If you cannot disable them from Settings→Apps→Manage Apps, you will need to root your device. Having done that, there are several apps available allowing you to "freeze" unwanted system apps. The most well-known of them is Titanium Backup which, as a side-effect, provides you with a powerful backup solution. Another candidate for that is App Quarantine ROOT/FREEZE.