This any most other articles seem to point to the masks protecting others when the sick person is wearing a mask, that's why it's effective in China. Based on that you wearing a mask is not helping you at all, but if you are sick it's protecting everyone else. So unless you're worried about everyone else there's no reason for you to wear a mask.
a) Masks prevent you from touching your face.
b) The virus is spreading asymptomatically, and the viral payload is highest at the beginning of infection. Most of the community spread infection is coming during this period. Sick people stay at home more and cause less infection than healthy asymptomatic patients. Telling only sick people to wear masks does almost nothing to stop the contagion.
c) Telling people not to buy masks until they're sick means they won't have a mask once they get sick.
d) China implemented mask wearing on the entire population, and they're containing the outbreak. Is this solid proof that it's helping? No, but it sure isn't hurting them and it seems like it helped.
e) The claim that a surgical mask or an improperly fitted mask means that a person is not fully protected, is true. But, though it might not block all virus particles all of the time, it will still block all virus particles some of the time.
f) Most of the reasons given by the CDC are basically - "hey there's unrelated reasons where it doesn't work!!". Correct, not sanitizing properly can still lead to infection even with a mask. But even the most properly fitted mask, where the user doesn't wear goggles, is risking infection. Stick with the facts - wearing a mask decreases likelihood of infection.
g) What mask shortage? Medical staff don't need masks if anyways they're completely useless for prevention (according to CDC). Just save a couple thousand masks for the 160 COVID patients and all the medical staff will be fine and dandy.
h) Is it really that hard to see that the CDC is in anti-panic mode, and trying to control the impending backlash against them, spitting out nonsense like - "the immediate risk is low" - translation - soon the risk will be pretty high, but we want you to feel everything is fine.
Edit:
i) Increased exposure leads to increased severity of illness and death. Hence all the young healthy doctors that statistically shouldn't be dying, but are. Even with a bad mask, not being exposed to the full payload is better than nothing.