That is a fair point, however, not all phone numbers are capable of receiving text messages (landline numbers typically are not able to receive text messages),

That is a fair point, however, not all phone numbers are capable of receiving text messages (landline numbers typically are not able to receive text messages), so texting would only work for those numbers that are capable of receiving texts. But if the number is capable of receiving texts, the caller should also send a text message to the number as well.