Just like that card, this card actively cannot win you the game and its only effect is to force a draw
When you don't want other things from white and when you can just run power houses like Upheaval/Wildfire instead this situational six drop you have to splash for is not popular
We may not enjoy it, but its still marketed as a childrens anime and card game, and not all countries are very lenient on risqu material -even if theres no real harm
You can check them all out on Serebii, but my personal favourites are Phanpy because I love Phanpy and this makes it even more adorable and Goomy, because who doesnt want to look at a crocheted blob of purple ooze
The mostly insignificant life loss gets far outweighed by the benefits of plays like turn 1 Rhystic Study
For example, if you discover 6, you could cast Bruce Banner (who has mana value 1) or The Incredible Hulk (who has mana value 6)