That's like using spears as your weapon and saying level 2 in spears will get you enough power to kill. Yeah sure, but come on.
Oh, so you want specialization-level proficiency without having to invest in getting it?
If your whole purpose is to mine in game and build the absolute biggest things...then why would specializing in mining feel like being pigeonholed?
Plus you mentioned early game. Early game, level 2 miner69er is plenty...midgame, level 2 miner69er with a Q3-5 iron or steel tool, which is easily available from loot or a trader (and at worst, you'd have a Q2 iron pick) IS plenty....just like level 2 spears with a Q3-5 iron or steel spear would be. And late game you have fully modded Q6 or an auger....just like you'd have a fully modded Q6 spear...or a rifle.
You have multiple options (strength focus, strength splash, perception wrench mining, auger mining, taking over a POI and buying the last few mats from a trader), and 1 is better than the others. If I want to mow down zombies as fast as possible, I also have multiple options, but one is going to be the best. An M60 will outperform the other weapons in sustained mass zombie killing. Does that mean I'm pigeonholed into endurance? that all other attributes are worthless? Or will that M60 still perform just fine with only a few points in machineguns? Maybe I could even use shotguns, AK47, marksman rifle, heck, even pistols....they might not be QUITE as effective, but if depends what each individual person wants to prioritize in a particular playthrough.
If i think being completely self-sufficient and crafting everything myself is the be-all, end-all of the game, then I'll probably main intelligence.
If I want to play a ninja and sneak and jump around, dealing with the blood moon horde by hit-and-run avoidance tactics, then agility is for me
If I want to play a mole-person, digging through the earth like that drill guy in "Incredibles" and whacking things with a giant hammer, then strength.
If I want to play a slow moving, unstoppable tank capable of dishing out sustained pain while staying alive, then endurance.
If I want to play any random combination of the above, knowing full well that I have to give up some things to get others, I can.
What I can't do, is everything, all at once, while being the best at everything. I can't specialize into both having cake, AND eating it.