That is too extreme. When I plop down $120+ for a "kit", I expect some documentation. LOC, and Minie Magg in particular, are touted as the perfect Level 1 rocket for HPR newbies. You know, "low and slow." Many of these builders need some hand holding, as evidenced by the basic questions posted on this forum. Given that nobody really knows where the CP is located on the Mini Magg or how to properly simulate it, the manufacturer should error on the side of caution for this kit.
Having built and flown a couple, this really isn't a hand holding situation. Build it, fly it. If you don't get stupid, you're fine. I've done one epoxy, one wood glue. Even done generously, it's a 12 piece puzzle. Now, if you start tossing around fiberglass on the fin tabs, doing 1" radius fillets, dumping half a pound of lead in the nose, yea then you're going to have issues.
LOC recommends G,H and I motors. If you stick to that and a "stock" build you're (generally) good. No rocket science here. The CP isn't a mystery. There are ways to simulate base drag, but personally I just shoot for .5 cal in rocksim.
As to it being the perfect L1, I think it's a terrible L1. The LOC IV or an Athena3 would be much better.
it's moot though, as LOC kits do come with basic documentation.
As for the larger argument on instructions, they're nice to have, but I don't think you can account for every type of build. Madcow includes them, and I deviate pretty quickly from them. MAC includes a good set, and I get slightly off track from those. Widman prefers to have build threads done here, and while informative, even those I choose a bit from this one, and some from that one, and do my own thing in other places.
If there's something unique about a build, documentation is good.... but for a general basic rocket...there's just so many ways to do it trying to cover each style of build would require about 10 sets of directions, or a massive confusing 'choose your own adventure' style book. A basic set is nice for rookies to follow, but I'm not going to get all twisted if I get a box of parts and a bunch of packing peanuts.