True, but I'd say it's still worth the email asking. I used to work in the mental health field requested paywalled research papers on cognitive and developmental disabilities pretty regularly, and about 80% of the people I contacted sent the paper to me without much question.

The more we all do it, the more expected the practice becomes and with any luck, these money-grubbing journals will take note and start offering copies at a minimal fee or time-limited access.