This is a very help idea for all the steemian to make their post or bolgs visible among others people...Alt text I never heard of such good idea but today from your post and clear examples given above gave me new way to post and to make it visible by adding alt text.
You are great expert and leader and a true steemian father who is always helping us to solve our problems.
I am heartly thankful to @Stephenkendal for making our life easy on steemit with your life saving posts!