How about protections provided by the military, for one?
Well, Scotland will have a military to protect us. But I don't really consider us under threat. We have a pretty good relationship with the rest of Europe and there's basically no prospect of Scotland being attacked by a neighbour.
Sadly being part of the UK seems to make us more of a target as the UK seems to want to project power and get involved around the globe.
Absent that, I'm not sure what protection Scotland needs other than a basic defence force.
But I return the question to you, what do the Scottish hope to obtain through independence? They already have the same freedoms and protections of British citizens, a point I note you didn't refute. Is it only because they don't have an equal voice in the parliament, as said a couple times in this thread? If so, their goals are more short-sighted than I thought.
The Scottish who vote Yes hope to obtain many things, each of them probably hopes to obtain different things. Amongst them are:
1. The same sense of nationhood that pretty much every other country in the world enjoys. Are any of them looking to give that up?
2. A government that is representative of us and represents us
3. The opportunity to build a fairer and more progressive small European nation
4. Proper and direct representation in international organisations like the UN, EU, NATO, etc.
5. The chance not to be railroaded into short-sighted and/or xenophobic policies by those who dominate the discussion in other parts of the UK - e.g. privatisation of the NHS, withdrawal from the EU, immigration controls, austerity, etc etc.
There's a long long list...but there's a start.
Yes, Scottish people have the same freedoms and protections of British citizens - because we are - but so what? If the US was governed from Beijing and you had all the same freedoms and protections of Chinese citizens would that be a reason to oppose US independence?