What you’re describing does exist. Google “THC inhaler” and you’ll see a few examples of it.

I don’t use an inhaler like that, but I do use a dry herb vaporiser. You put your ground bud into it (like packing a pipe or bong), and it heats the flower to somewhere around 170-200 degrees Celsius. Since the temp is so low, the flower doesn’t burn it at all, so no smoke or ash is produced, only vapor. It’s so much better for you than combustion, relatively speaking, that my country’s rules for medical cannabis prescriptions say that prescribed flower should never be smoked, only vaporised.

That vaguely reminds me of “Welcome to the Zoo” from the interactive kids game “Putt-Putt Saves the Zoo”.