I totally agree! I remember the days of shitty brick weed ( which is all that was available most of the time ) full of seeds and stems. It seems at least to me that once the THC levels are over 20% I can't really tell the difference. I'm not saying that there is no difference. I'm just saying 20% has some hair on it's azz .
Oh yeah brick weed was all there was. We were lucky and got decent brick for the most part. It was typically green with few seeds instead of brown and nothing but seeds (though I have had that as well lol) The first good weed I had was Christmas bud and then Beasters. I got to take two hits of northern lights and that was about it until about 5 years later.
Anything and everything wrecks me at this point. There was a time where I would have been right there with you. I am sure there is a big difference between 20% and even 25% but to act like anything under 20% is worthless boggles my mind. Anything less than that is mids when anything above 6% used to be kind bud at least