The last gasp of dual Herbig Haro star (H2-9), So, it is not one of their siblings without dual hotspots.

 The origin of Butterfly nebula with- or without hotspots.

According to Q-FFF Theory, The first Herbig Haro stars need two equal sized black holes, to polarize the vacuum and create a star in the middle by sweeping the plasma through the polarized vacuum. example (H2-9) they dye with two hotspots and/or as butterfly nebula.

However Younger sibling stars of those growing stars, (often binary stars) will dye without the dual hotspots or even butterfly shapes. Stars are growing by the impact of water producing Comets. and ejecting new binary stars (see image). Binary stars could create butterfly nebula without dual hotspots or dual lobes. 

 see: Herbig Haro Astrophysics Based on Dual Rigid String Black Holes. https://vixra.org/pdf/2007.0158v1.pdf

Dual Black Hole based Herbig Haro stars are the origin of binary stars and dual hotspot / Butterfly Nebula

Smallest Herbig Haro BHs create only dark (failed) stars. see  Bok globules.

https://www.forbes.com/sites/startswithabang/2020/09/28/this-is-what-the-last-gasp-of-a-dying-sun-like-star-looks-like/?fbclid=IwAR0z87JPjZurWiWoWcqEiFJKCVqybbMoTiMit_U9GKlhgNhTVwik43792w0#4396bceb79ab 

Bok globule photo and how ejecting star-siblings are made by over-growing stars with water. by crashed comets.

We need new black hole physics with a fermion creating and repelling horizon.