I don't see this as some equity issue people are framing it as.
Issuers have the rules of $25k, $500k, etc bc they really don't want to deal with inexperienced investors (doctors, dentists, etc, etc).... who get fearful when they write a check, are inexperienced and so try to micromanage, and worry incessantly about exits and can be short sighted. Angels are great at hiding all of this, until after the deal closes.
It makes sense to heavily filter people like that out - it would be damn terrible as a founder to have to deal with 300 people who all invested "their life savings of $10k". If you haven't been involved in many private deals, you might not believe that. But most deals are small, rosey-eyed-until-a-loss-might-occur "angels".