You are so rooted in your perspective you seriously are unable to see what should be obvious?
You asked so I will point out the obvious. Both Conclusive Shot and Minor Magic Resistance have Cool Downs that are shorter lived than the effect. Does spamming CS add skill? If not, are you looking to disallow it based on your litmus test? If so, MMR shares its CD with other potions (1 min) where CS has no such limitation. If it takes skill to use CS then it certainly takes skill to use MMR as there is more to consider as use of it impacts other choices.
The misconception of what is and is not skillful play is the problem combined with the over emphasis of individual play in a team game by many players.
skill [skil]
noun 1. the ability, coming from one's knowledge, practice, aptitude, etc., to do something well: Carpentry was one of his many skills.
2. competent excellence in performance; expertness; dexterity: The dancers performed with skill.
3. a craft, trade, or job requiring manual dexterity or special training in which a person has competence and experience: the skill of cabinetmaking.
http://m.dictionary.com/d/?q=skill&o=0&l=dir
The proper use of anything requires skill and the more things you have access to increases the amount of skill required. Planning too takes more skill when confronted with more variables. Based on your own litmus test and in light of what "skill" means using consumables adds more opportunity to display skill or the lack of it by way of more difficulty and more things to consider.
Consider your question answered. If you can't see it now you never will...
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