It’s winter so I find myself eating more soups and stews. They can be so good on a cold day.
But IMO celery tastes horrible and only subtracts from the flavor of soup by covering up other flavors. Why is it such a common ingredient? Do people actually like enjoy or is it serving some other purpose?
(Yes I avoid it in other foods too. Not to go off topic but water chestnuts are a fantastic substitute if you like the crunch. Try them instead of celery next time you make stuffing.)
In addition to what the others said about mirepoix, or stock, soups are experienced as more full-bodied or wholehearted when celery root is added. The earthy, bitter taste can be balanced by the right combination of sweetness (from other vegetables) and saltiness or used as intensifying effect for a strong umami taste, e.g. in poultry stock.
I haven’t met anyone who specifically disliked the taste of celery root in soups yet.
Out of curiosity, do you also dislike other earthy tastes, like truffles, lamb, champignons, girolles?