Kill all proportional fonts!

[Colin Baxter 😺]

Hello,

I am beginning to hate with a vengeance the new proportional fonts used
in emacs-29.0.50. They seem to crop up everywhere. I have got rid of them
from the mode-line and gnus headers but now they appear in eww and gnus 
html articles. The latter I can wash with toggle html fonts. But I want
a permanent global solution. Is there any emacs-init setting I can use
to banish proportional fonts totally from emacs - preferably forever.

If it's relevant, I have

(set-frame-font
 "-unknown-DejaVu Sans Mono-normal-normal-normal-*-16-*-*-*-m-0-iso10646-1")

Thank you.

Colin Baxter.