Would you please go further into detail of what you're talking about? Are you talking about cleaning dishware? Surfaces? I'm saying this because in many contexts, this would be worse advice for sanitation.

For example, if you dilute a cleaning agent too much, not only would it be less effective, but it might even become susceptible to contamination. Things you think you're cleaning could actually get worse.

There's also a difference with mechanical action from scrubbing. Many substances stuck to a surface won't come off with just water pressure. Scrubbing them away with a sponge would be necessary.

If you put a gritty cleaner in water, even diluted it will leave a gritty film when dried. Then you need to rinse just with water anyway.