To leave or not to leave,that is the ?

Ok my nature is OCD so i trim to keep my plants lookin pretty,BUT on slightly sick plants I dont...the reason behind this logic being sick plants need a place to push out any toxins they have ingested,so by keeping a yellow sick leaf ON the plant I'm giving the plant a place to shed the toxins until the plant sheds the leaf on its own...now if i cut off ALL the sick leaves,the plant wont have these outlets to put toxins,resulting in some once healthy leaves becoming SICK looking leaves,as the plant tries to shed toxins....Does that make sense to any other growers???

No it doesn't, plants don't shed toxins. They must be flushed outta the soil, cutting fan leaves will cut photosynthesis