Earlier quoted context omitted.
His difficulty was finding postage stamps for the self-addressed return envelope, and clearly the author is not American. Do you think it would be quite so easy to "buy envelopes and stamps" if you had to send a stamped return envelope to Nepal or Manila? Is that a "basic life skill" or would you have to do a little research to figure out what you'd need?
He had difficulty writing an address on an envelope. This skill is something we expect of 8 year old children.
So I usually do some practice writing on scratch paper before attempting the final version.
Notice he said "printing the address would have taken less time". That doesn't sound like the issue was formatting or knowledge. It reads to me as the physical skill of penmanship.