"I Feel Love" was a huge record. They took the electronica sounds of Kraftwerk and combined it with her lush vocal. I don't think anyone other than Moroder would have thought those two very different styles could mesh.
In addition, Duran Duran agrees with you. This from the Guardian obit which is linked in the prior post:
In a message posted on Facebook, Nick Rhodes of Duran Duran praised her legacy and in particular the influence of one track. "For me, there is no doubt that her song I Feel Love had a dramatic effect on modern music. It was certainly a key influence on my work with Duran Duran."
Along with producer Giorgio Moroder, she pioneered the use of electronic sequencers in dance music, Rhodes said. "Today that sound seems so familiar, but in 1977 it was a brave new frontier. It's extremely rare that you hear one song that completely changes the way you perceive music. I Feel Love achieved that."