An interesting topic. In this country, there are many services for the deaf so I am concluding that his message is directed towards those countries where the deaf have been neglected.
you are right that there are many services for the deaf. However, living 1 hour north of Los Angeles in the late 90s, I tried to find my then 6 year old daugthter someone that could teach her basic CCD. Could not find one. We attended Mass most Sundays; her with a book to keep her entertained, as her sister was an altar server. It wasn’t really easy and now with internet access things have improved immensely.