I think that the advice is a bit more nuanced, your first example is fine as it is but consider the variants: "...that are clearly always available." "...that

I think that the advice is a bit more nuanced, your first example is fine as it is but consider the variants: "...that are clearly always available." "...that are obviously available." "...that are simply available." These adverbs are not only redundant but their presence suggest that things are actually not clear, simple or obvious.