I had 52 acres of tree plantings on my old 824 acre farm. The previous owner had put them in maybe 5-7 years before I bought it. I spent 2 years doing weed control & various protection to rescue some that remained. Most were extremely stunted and the good quality oaks especially, even 500 yards from the main timber were rubbed to heck. I was able to save an immense amount but I spent a solid week doing it the 1st year I started assessing things & fixing them. That's 52 acres of tree plantings at around 700-ish trees per acre. Finding an untouched tree was pretty tough. Yes, tree tubes have their down sides. If it were ME, I'd rather do 100 trees with some sort of cages around them & eventually some screen around bottom to keep rabbits & mice away & keep them clean of weeds for several years. I'd rather do 100 like that than 1,000 thrown out at random to fend for themselves. You generally could make a cage with some wire (one of many options to protect) & a t post or 2 (which I pull from around the farm - free. Could have a tree caged in probably 2 minutes.
Less trees done right VS more trees left to chance? I've seen it so many times my head spins.... do it right. It's a shame how many tree plantings I've seen go to crap. If I had to guess?!?!?????..... I'm gonna say 70-80% of tree plantings I've seen have massive mistakes. Everything from not doing them right to begin with but far more often, making mistakes for the very important 5-10 years following. Letting them go, whatever, never watching weeds, never checking back on protection, never watering if it's a drought year, never watching for pests/bugs/disease, letting tubes fall over, WHATEVER. Seen too many scenarios where guys would have been better off tossing $100 bills out the car window for the day - at least that would be some fun.