I've already mentioned above, I probably dont need stones as much as you guys do because I use elephant soap for construction. I, however, do have alot of digging designation in advance and i see no problem with my miner going break on the job, fortress growth is always slower then digging process. Since when blacksmiths use more then 800 units of ore per year?
Keep in mind that in the current version, ores are much more common than they are going to be, it's not good to get in the habit of relying on a single miner chancing on ore veins and using that to fuel all your metalworking. A fortress might not use more than 800 units of metal in a given year, but at least some of that metal needs to be of a specific type (weapons grade, mandates if you care about them), and it will soon be hard to simply chance upon that much metal in the course of a year.
Chopping tree is very safe in the first year, which should net you over a thousand logs provided you are not on a desert. If you are one of those people who plan his fortress in advance, you also have a very large area secured with various means, usually enough to have 200-300 logs inside, which's plentiful for several years straight. Morever, chopping isnt a value-related job, new immigrants can do (and die trying) without anyone giving a damn. Weight is a huge factor for bins, barrels and cages because they get hauled around often and while -palm bin- are servicable, I'd rather my ☼«☼palm bin☼»☼ with masterwork star ruby decorations to boost hauler's happiness with minimal cost.
Valid points, however, keep in mind how much easier it is to enclose and protect an underground mine as opposed to an above ground tree preserve. Walling off the area is easy as pie, but what happens when some buzzards decide to harass your workers, or a dragon or giant eagle decides to make some Dwarf Roast for dinner? Underground trees are a bit more feasible, but they require large areas of space where you can't have any civilians going (otherwise the saplings get trampled and die), and you need to deal with blocking off the caverns you breached to allow them. Compare this to stone, with is always plentiful if you're digging through anything other than soil and can be used for many (though not all) of the things wood can be used for.