If only were that simply. The WHO have summarised the various recent studies and credible efforts at modelling, and they are saying that the wearing of a mask only reduces the chance of transmission between 3% and 11%. In the words of the WHO the reduction is "slight", whereas the wee wee analogy is probably 100%. That wee wee cartoon is laibale to encourage people into thinking they can use public transport and enter shops wearing a mask with little or no risk of transmitting the disease, which is about as far from the truth as it is possible to get.
And that is the danger. Intelligent people such as yourself are already believing that masks are highly effective and spreading that misinformation, when in actual fact they have very little chance of reducting the spread of infection.
Wear them by all means, but don't be thinking it makes you safe around others. Read up on how to wear and remove them and wash them without creating a risk of cross contamination. Just blithely donning one and blithely going about your business otherwise as normal does bugger all.