Thanks to those Navagraha doshas, folks deal with a variety of obstructions & hindrances in their daily life. To be able to minimize and negate the malefic doshas or malefic influence of such planets, we complete different Pujas & Yagnas. A different etymology suggests that valga usually means "to paralyze" https://www.youtube.com/shorts/5VeSyP9JRw0