I’m not sure what you’re referring to as a “fetish” or an “unregulated” lobby. If you were referring to nonsense like the NRA and their fundraising efforts, you’d be obligated to highlight Everytown etc. and their blue-aligned fundraising. You can’t point out a wedge issue and one side without recognizing the other side and its equivalent benefit.
If one has a clean criminal history, is a legal adult, and - in most states - has undergone some additional scrutiny or proof of proficiency, then sure - they can buy a firearm.
Given how Afghanistan turned out, I’m not sure how you think the concept of resisting the armed forces of a government as a distributed and well-armed populace is somehow unthinkable.
It’s fair to say we’ve a cesspool of stupidity - but only due to our politicians continued neglect of actual underlying issues in favor of partisan wedge-driving and profiteering of the ad revenue of sensationalized violence.