Exactly. And in the interim, we can put such people on notice with the authorities such that they get the increased scrutiny they need when they need it.
For example, if we had a "shades of grey" Red Flag law, it might go like this:
Angry Nutter posts crazy stuff on social media about killing people and such.
People see this and report it.
The authorities make digital copies of Angry Nutter's posts and flag Angry Nutter as a potential threat.
Angry Nutter goes to a gun store to buy a weapon.
The store runs a check on Angry Nutter.
It comes back that Angry Nutter has been flagged as a possible risk.
The store's salesperson tells Angry Nutter, "Sorry, I can't sell you a gun today." He hands Angry Nutter a page with contact information. "I don't know what the problem is, but you need to contact one of these agencies and find out. Once you straighten things out with them, I'll be happy to sell you a gun. Would you like to make a down payment to hold it until things are cleared up?"
This is the current "Red Flag" situation where if you get on the 'list' you are screwed and getting off is a nightmare. Rather here, you have to go down to the local police station or the like and be interviewed for a few minutes about your crazy posts and such. If the interviewer decides you aren't the crazy threat the authorities thought you were, you're free to buy a gun. The system is tilted towards letting you buy rather than against you by design. The authorities want you to not be a nutjob. They want you to say you're just a troll, and prove it to a good degree. No draconian requirements involved.
Once you prove this, you get your gun and off you go happy with life once again.
Is it perfect? No. No system is going to be. The idea here is that say your angry ex- puts you on the list. You get denied. You go to the authorities and seeing the evidence (which they HAVE to show you), say "That's just my batshit crazy ex-, she hates me. I'm buying a new deer rifle for the season next month, she got my old one in the settlement."
The authorities let you buy a new deer rifle. Oh, the police might investigate the crazy ex- for frivolously putting you on the list too. Once the word gets out reporting someone frivolously or maliciously will get you arrested, that crap will mostly stop too.
In the Uvalde situation this might have stopped the crazy 18-year-old in his tracks.