Maybe if you look it all up on the internet and follow a step by step guide saying "go here, do this, then this, then this, and use this ship with this build," but for "regular" players it's going to be a whole different story.
From start to finish (finding the sites, figuring out what to do, figuring out how to do it, etc) it took me over 16 hours to get ONE blueprint. Subsequent sites still took over an hour each just to figure out the layout, the proper "key," fighting the sentinels, etc, and after around 20 hours and 4 sites (repeating sites in some cases) I still don't have the materials to unlock ANYTHING. I also don't have much in the way of real leads for how to find new sites or beacons (going to check the handful of blue dots in the galmap and see what comes of it), so who knows when anything will come of this venture.
I don't blame anyone AT ALL for relogging to acquire more materials. It seems like the materials you get, apart from the blueprints themselves, are random anyway. I'm supposed to get 21 Guardian Tech components for the FSD booster but for some reason even though it's only a G2 material I've only ever acquired one of them while other items (which I don't need or want) are piling up. At first I thought maybe they were found in some different kind of site or something but nope - turns out they are one of the many random drops you can get from shooting off those breakable panels, and for some reason they're just not appearing. The "smart" thing to do is absolutely to keep relogging and shooting those panels because if the RNG is skewed in the wrong direction you'll effectively NEVER get enough of what you need by doing things the "right" way.
I'm going to keep playing the game spoiler free and in "good faith" to see what comes of it, more out of morbid curiosity than anything else, but I have to say so far the entire project feels like a dead end at this point.
Anyway: looking things up on the internet, as well as relogging, are in my opinion both forms of "soft" cheating. If you want to play the game in good faith, you should avoid both. At the same time, it really is important for the designers to ensure that they build their game in such a way as to accommodate both of these playstyles, and Elite has mostly been a big fail in both areas, though the addition of the Codex and the changes to exploration are a huge step in the right direction and at least give me hope.
I must admit that while I agree with the soft cheating definition, I have done both of what you described, along with having done obviously broken 50 mil cr wing missions, etc. I obviously have no issue with anyone else doing it and it is going to happen when people with short attention spans (like me) play the game.
Looking at some of the gameplay though, for example Thargoid interceptors, which pretty much needs guardian weapons for someone to attempt. I'm not sure most people would have a chance of getting these without looking up what to do, or even have the first clue about killing the Interceptor. There is plenty locked off by simply having no understanding of what to do.
I wonder how much of the complaints about not enough being in the game is because people don't know how to even look for it. I agree that the codex is at least a step in the right direction though since it gives clearer indicators of where things are.