Puranas of Sanatha dharma allows different types of interpretations. Some are historical, some are metaphorical, some are symbolical, some are allegorical, some are scientific facts including astronomy etc.,
The actual truth can be obtained from the commentaries of great practitioners of Sanathan Dharma.
In short, Lord Shiva performed a Leela and most of the Leelas are generally misunderstood by many people. I think, the same is happening with the Leela of Shiva taking the form of Linga as described in the scripture Shiva Purana.
In this context, is there any commentary by any great practitioners of sanathan dharma for the story cited above?
Note: Please read the story from the link I provided. It is long enough and hence I did not paste it here.