If (hypothetically) they specifically guide you to use more than necessary, thus wasting detergent, theyre making you spend more money on their product, thus extracting money from you.
Microwave popcorn isn’t a reasonable analogue because you don’t “use more product” following their instructions. Maybe hot chocolate is a good example? Every package I’ve bought has suggested using basically 2x as much as I find I need to make a mug of it.
No no no no no no no no no no no no no no