Most of the active members of this community have next to no experience with scorerunning and mainly play for survival. When you take this into account, it's completely logical that survival runs get more praise, because most people are most familiar with them and recognize the difficulty. It does not mean that they are harder to perform. In fact, difficulty shouldn't even be a factor, because these are people's hard-earned accomplishments, whatever they are.
Accomplishments are subjective and personal and completely unreleated to the discussion here. Achievements and goals are personal, not meant for gaining praise from some community. The best achievement is a personal achievement, something that's important to you and something that you like yourself. For example I'm almost the only person in this forum whose main achievements are from IN easy, but they are great to me since I liked them and put a lot of effort to them - they were achievements to ME, not the other people.
Therefore the community should not care about other's achievements that much. What the community may care about is the difficulty and skill level of the achievement, and how much patience it has required, since those things are unchanging. In terms of difficulty, however, you should not say shit unless you know the game to the fullest. I know several actually good scorerunners who will back me up when I say that IN Youmu is hard as fuck, since it's not only an opinion of some scrub shitplayer from fagland but a commonly known fact. I don't see the Finnish 14year-old otakus coming to me and telling which Touhou is the easiest, and neither should you if you don't know the games well enough. I might have worded myself a bit wrongly in the first post, but I hope this clarifies my opinion.
I'm still happy with my survivalist perspective, and considering that, IN is easiest touhou.
You could have said
IN is the easiest Touhou to survive in, or
IN is the easiest Touhou to clear, you know.
There would at least be some consequence for failing it since you'll have to go through a (from a non-scoring Pov) really long and tedious level for every shot at it. It would certainly make the accomplishment worth more but the question is just whether it would be worth enough? You are not really proving anything by doing it beyond having great levels of patience.
It has the pressure of a full run behind yourself, man. It's not just restartable, you know that there's another full run incoming if you have to do it. The pressure of a full run is huge, it ruined almost a perfect consistency with UFO to levels of zero for me, do not underestimate it.
That's not my point, though. Scoring challenges your patience and precision above anything else.
So does survival, when you want to stay alive. You will have to endure the restarts through the levels and carefully dodge everything. Also, resource management is a huge thing in both cases. I have no idea where you are going at.