I must admit to being mysified by the usage of LHP in the West — I understand what it means in Hinduism.
Those who emphasise the importance of self-development could be describing most polytheism. If followers of Odin are LHP, then what of followers of Zeus? Nor was the worship of Set seen as anomalous in Ancient Egypt, where he was regarded as their patron deity by the Ramessid dynasty. Reading the web-sites of theistic satanists, I feel much more at home theologically than I do with Wiccans.
Historically, the terms LHP and RHP were introduced in the West by Blavatsky, who contrasted her "respectable" RHP magic with the old "demonic" LHP of the grimoires. Even Crowley claimed to be RHP, I believe. The positive use of LHP started in my life-time (although that goes back some way!)