I have recently, or a long time ago, started to reflect on the fact that h is a really important letter. But precisely stuff that changes the meaning of things, that changes the understanding and judgment of what you hear or read, which then when you listen is silent, it makes little difference, but you can feel in the face whether someone is using the "H" or not in the right place and at the right time. There's no need for me to explain more, in more detail, because I'm talking about all those situations in which we think the verb to have should be used in the present tense which requires the "H" and all those times in which we abbreviate an or which instead doesn't require it, and all other situations of the same kind. A bit like the "e" with or without an accent, come on.