Excuse me what? The Grandma is shot dead before she could even pull the trigger.

And she could be stabbed from behind, or hit in the back of the head with a bat before she even saw her attacker. Yeah there's no guarantees in any sort of fight.

You are right on one thing- she'd probably never be quite as happy. I think you assume gun owners are spoiling for a fight, eagerly awaiting 'their moment to shine'. It's really not true though. Not for myself or anyone I know at least.

As a gun owner, I've spent a lot of time thinking about such things. Being shot isn't like in the movies where someone falls down and music plays and the hero rescues the girl, it's ugly and painful, it's like stabbing someone with a giant screwdriver by remote control. I hope I can live the rest of my life without ever shooting anybody or taking a life by any other means, because I'm pretty sure I'd never be quite whole ever again. I've always declined invitations to go hunting because I don't want to be the one to take the life of an animal, I don't even squish insects most of the time I capture and release them outside. So taking the life of another human is not something I ever want to do.

But what I want even less than that, is to do nothing while people I love are harmed. And so, if I have to trade my conscience and mental health for the physical wellbeing of my family or myself, then I will consider that a more than fair trade.
And I think the granny in our analogy would rather be alive and feeling guilty than dead. I know I would be.

Yes, mental illness might also be an issue but you also dont do shit to solve that issue.

This is one thing I HATE about my country- we have forgotten how important it is to take care of our own citizens. And I blame conservatives (the usually pro-gun ones) for this a lot more than liberals, but liberals deserve plenty of blame as well. Both parties find it effective and expedient to whip up voters with 'those other guys hate America!'.
It's not just mental health, it's everything. Look at student loans- kids take on crushing debt because they're told it's the only way to get a good job, only wages are stagnant and they can't make ends meet. Do we help them, the millions of our fellow countrymen who are in a really bad situation? Nah, fuck them, they did it to themselves.
And look at healthcare as a whole. People get cancer and go bankrupt with health insurance and it's just like oh well, like that's the way things are supposed to be.
Meanwhile the wealth of our nation is being extracted by a bunch of business interests that basically have the government in a state of regulatory capture (that video is from 2011 and it's even worse today) and the people of the nation are too busy blaming each other to work together and FIX some of our VERY REAL problems.

So yes, I support gun rights. But please don't lump me in with the loud and obnoxious lemming-conservatives who only use mental health as a way to defend against gun control then do nothing at all to actually improve mental health.

If it were up to me, we'd be spending BILLIONS on mental health, if not tens or hundreds of billions. If it were up to me, our defense budget would get a haircut (we really don't need to spend more on military than the next 10 nations, including all of our major enemies, combined) and that money would be re-invested in America's PEOPLE. Education, mental health, health care, etc. Schools should be palaces and teaching kids should be a well-paid, sought-after, competitive position that carries respect and prestige, not the current situation where teachers are basically underpaid babysitters that are expected to teach the test and then we act confused when entire generations of kids grow up with no critical thinking skills.

I believe the markets, and the corporations, and the government, do and should exist for the benefit of the populace overall, not the other way around. I think many in the US have forgotten that ideal.