Most Americans don't want to strike down the 2nd amendment but neither do they want completely unrestricted access firearms. In other words, most Americans won't some measure of gun control but they don't want to abolish private ownership.
You can't have it both ways.
The Second Amendment affirms the right of the people to keep and bear arms, and forbids infringement of this right. As long as the Second Amendment stands, every act of government which interferes with this right is blatantly illegal and unconstitutional.
If it is desired that government should have any legitimate authority to interfere with this right, then this can only be achieved by ratifying a new amendment which supersedes the Second Amendment, and which establishes this authority on the part of government.
Unless and until that is done, the highest law of the land is that the American people do, indeed, have an unrestricted right to acquire, possess, and carry arms, and that there is not a thing that government can legitimately do against this right.
It would be difficult to change the constitution to include gun control because the country is too divided as to the amount of gun control they want and what kind of control. Till then, which may be never, the courts will have to determine just how much gun control is allowed.
92% does seem high. Possibly this poll was taken the day after a mass shooting. However, there are just too many polls by major polling services that all come up the same conclusion, most people want stricter gun controls. It's also clear from the polls that the specific gun control measure is very important to people.
By wise design, it is indeed difficult to amend the Constitution. But if there was really anything close to 92% support for it, then it would happen. 92% support is more than enough to assure that such an effort would be undertaken, and that it would succeed. That it has not happened, and that there is not any plausible effort underway to make it happen proves, beyond any question, that the 92% claim is a flat-out lie, and that most of those who insist on repeating it know damn well that it is a lie.