The problem is you haven't actually offset anything, and by the time you find out that you have offset nothing, the carbon you were hoping to sequester is back

The problem is you haven't actually offset anything, and by the time you find out that you have offset nothing, the carbon you were hoping to sequester is back again. There's other not good (carbon-wise) uses of trees, like harvesting for firewood, or culling to prevent the spread of diseases like oak wilt or bugs like the emerald ash borer. Compared to chemically weathering minerals, trees are at best a gamble. Most people aren't stuffing dead ones in really deep holes; the best we can hope for now is they get cut up into quality furniture or building materials that will last decades or more. There's really very little long-term upside to randomly planting trees and hoping for the best, aside from the fact that trees are really nice things and intrinsically good to have. Just not a super effective carbon sequestration scheme by comparison.