With 6 stats and a die roll method that boosts the expected result to 12 instead of 10, sure, you do get things skewing a little higher and the chances of getting a 17+ in a stat do increase (I'd take issue with the claim of MASSIVE!!1!). But that doesn't approximate a flat distribution. The most frequent bonus will still be +1 and those are a lot more likely than +3 or +4. Either way, the assumption the rules make is that stats are distributed along something much closer to a normal distribution than a flat one.
dropping 7 dice yes each one has a 1 in 6 chance of landing on any number, but for the most part it will over time bend toward the average (3). you will roll some 1s (a -1 stat) some 6s (a +4) but over all I bet if you make... you know what let me see
7d6 (I put in order cause my brain does that)
1 5,5,4,2,2,2,1 this generates +3(16-17)x2 and +2 (14-15) and 0 (10-11)x3... these stats suck
2 6,5,4,3,3,3,1 this generates +4(18+), +3(16-17) +2(14-15), then +1(12-13)x3.... not bad
3 3,3,3,3,2,1,1 this gives +2(14-15)x4 0 (10-11) and a -1 (8-9)... can be played but do not like
4 6,6,4,2,1,1,1 this gives +4(18+)x2, +2(14-15) 0 (10-11) -1 (8-9)x2... damn such a good and bad character...
I rolled 28 dice (I rolled the same 7 cause I mean why not) so that shouldn't really statically equal out but lets see... total 83 average 2.96 so only slightly below average...
And, while that is traditional, it's a pretty fundamental assumption throughout D&D character design that bonuses that deviate from +0 should be less frequent (rolled)/more expensive (bought with points) the better they are. Do you think there's something wrong with that design?
no, not something wrong, just something we do by rote and have as tradition of... if we built a new game from the ground up would 3-18 be our go to? I don't even know. I know this. When I started in 2e having above an 18 in anything (other then with belt of giant str) was unheard of... the tales of a Int 20 wiz or wis 20 cleric would not only be legendary in game, but in the group out of game as well. Now when we play high level having a 20 stat is pretty common (and having a 25 was not a big deal in 3e)
Just because something is a tradition doesn't make it wrong. Just because it is a tradition doesn't make it right (some sacred cows NEED to be made into hamburg) But as you see not just with you but with other posters, just pointing out it didn't HAVE to be that way make you feel weird and defensive.
I assume back when gary did this d6's were some of the only dice they had. now we have so many I don't even know all the variables... but you can make a system roll 3d8, or 3d10, or even 3d12. I remember Darksun had you roll 5d4...
but you can see at least 1 poster wont play a system of D&D (or adjacent) that changed to just modifier.