First, if America was a cannabis using bunch of pot heads in the 1700s led by the founders and heroes of this nation, then they would use the product freely, and with familiarity, they would grow great pot and make and use hashish, they would sell it, party with with, write about it, there would have been a booming pot trade and pot shops, and pot would be immensely popular in America and and for centuries, with no break from then until now.
Instead there is zero reason to think that your lies are anything but lies.
The problem with your scenario is that you’re assuming pot was as strong then as it is now. The last 30 years have seen an explosion of weed strength by deliberate cultivation using modern techniques. What if the Founders had better things to do do, because weed grew like a weed and everyone had it and besides, they liked it mild?
They didn’t talk about their plethora of vegetables either - way more varieties than we have now. But they had them. People don’t talk about ordinary things. Their cultivation topic of the day was tobacco. Maybe they liked their weed as it was. But they did in fact grow it, and have it, and tend it as one would for smoking - ie Washington writing about separating the sexes of the plants.
Obviously they weren’t “pot heads,” because they didn’t let it wreck their mental acuity. But that, in turn, would mean that they used their mental acuity to smoke the right amount simply to relax, and not go overboard. As well, look up someday how much alcohol it was common for people to drink back then - way, way more than now. Yet no one calls them drunks, because by the way they lived their lives, they proved they were no such things. Same with weed, then.