I agree actually, it’s definitely overused - however there are studies linking synthetic detergents and softeners (maybe not specifically the scents in them but nevertheless) to carcinogenic ingredients. I’ll try and link one here later if I can find it.

But even more than that it is well known that they are extremely damaging to the environment for several reasons, when compared to plain soap or milder, biodegradable cleaners, (killing microorganisms and destroying biodiversity; surfactants causing foaming in rivers and leading to long term damage; changing the ph in soil and water; inorganic phosphates causing eutrophication which depletes oxygen in water; they don’t properly biodegrade, causing maximum long term pollution of soil, rivers and water sources;), so in that case they are far worse than what we might commonly use the word toxic for.