I guess because I live in a country where marijuana is fully legalized, I have never seen this as an issue. Our pot is labelled in the same way alcohol is, so you know pretty close to exactly what you are in for.
You can buy weed that has nearly no THC and a whole lot of CBD. But we also have infused pre-rolls that are nearly double the strength of natural weed with no CBD. These are polar opposite experiences.
Everything is labelled both in Percent, and in mg/g so there is no mistaking whether or not the weed is strong, weak, or somewhere in between.
Everything also gets described with terpene measures, as those volatile oils have a huge impact on the experience. It's pretty much the reason why if it smells super dank and thick, you're headed for couch lock, and if it smells lemony fresh and clean, you're in for a super clear head buzz instead.
Likewise, marijuana is nearly always sold with an educational fact sheet. One learns early on that CBD is both medically useful, but also takes "the edge" off of strong weed. Beginners should start slow, and don't smoke weed that has 0% CBD.
Also there's the well known strategy: If you're the personality that tends to have that dread feeling when the buzz comes on, then start with only a small amount until you pass that first stage. Then you can smoke like crazy without that dread feeling, since it is really only triggered in the initial phase. Once you're adjusted into it, you're all good for the night.
Just don't smoke so much that you end up greening out. That's a real thing, but nearly only ever happens if you eat too much THC edibles at one time. It's hard to green out from toking once you get past the initial phase because auto-titration kicks in big time. Most people don't even realize they are doing it, but it has everything to do with why one can toke 10x the amount over the course of an evening at a party than they ever could at home, and never have that dread feeling that one can experience if they use too much from the start.
People usually only learn that through experience, but it should be part of the education. Knowing the phases (initial coming on, the buzz, then fading back to normal) greatly enhances the experience.