There are sixteen million Americans with concealed-carry licenses, plus fourteen states that allow for "constitutional carry" (e.g., no license required).
(Keep in mind that I do think that we should require training and licensing for concealed carry, although this needs to be balanced with not imposing an undue economic burden or disenfranchising minorities)
According to the Violence Policy Center -- a very solidly anti-gun group -- there were 27 murders committed by licensed concealed carriers in 2017 across the United States. That's a murder rate of 0.16 per 100,000 people.
By comparison, the total UK murder rate for the same year was six times that.
Likewise, the Czech Republic, which also has a lower murder rate than the UK, has "shall-issue" concealed carry licensing for gun owners -- just like Texas -- and the majority of Czech gun owners have such a license.
I think it's fair to say that concealed carriers are not the problem.
The idea that 'this is not a problem' is exactly the thing under dispute, so I don't think it should be cheerfully asserted
Objectors to this climate of easy access to firearms -wrong or right- will point to things like:
* criminal gun violence and mass shootings (a phenomenon that is staggeringly rare in most other comparable nations) but also to
* accidental gun deaths, frequently including of children, to
* suicides facilitated by this easy access to firearms, to
* the trigger-happiness of American cops being directly related to the significant likelihood that anyone those cops interact with is armed, compared to countries like the Australia, Japan, or New Zealand.
They also point to a political climate in which research into gun violence is blocked, and where measures such as universal background checks are supported by huge number citizens, but the political situation prevents these from being enacted.