I have never,
never, implied others play D&D wrong. Neither have I dismissed you or your views. I strongly disagree with them, but I've repied to your points. If you don't like the manner of my replies, you are under no obligation to reply.
I have every right, thank you very much.
Powerful build pushes PCs more towards melee builds than a simple STR +2!
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Melee builds relying on Strength most often go for the heaviest armor and biggest weapons possible--in other words, things that weigh the most. With powerful build, even groups who use the Variant rules don't have to worry about weight carried. In plate and shield and gear, you can easily push 100 lbs of weight, which the variant rules mean a STR 20 to manage without issue. With powerful build, that 100 lbs is managed with STR 10!
Oh, and let us not forget being able to pick up and move fallen PCs to safety...
As
@Maxperson explained, the simple +1 gained from STR +2 to things like attack rolls, damage, and checks is barely noticable by comparison. The
only time you will notice it, is the 5% of the time when you "miss by 1", which, of course, is only 5% of the time...
Using a standard array, I have many times simply put the +2 into the 8 if the ability score is not something that is needed for the character concept. For example, a heavily armored elf with DEX 10 (8+2) or half-orc wizard with STR 10 (8+2). I have often found the +2 very useful for removing a penalty in those cases when I play with others who want to include them.
Simple numerical features never restrict your choice of race/class combos. If you are the type of player who enjoys "optimizing" your PC, then they lean that way, certainly, but that is, again, your choice. Floating ASIs just make every PC optimal and bland as a result of which, as
@Maxperson points out.