Earlier quoted context omitted.
What are the cons of enabling zoom? Are there any?
- You're not enlarging the font size, you're scaling the entire viewport. When thew viewport is larger than the screen things like modals (or other UI elements) may not appear where they are supposed to, if at all for the user - slows down the time browsers respond to a tap by 300ms - makes text difficult to read by the time the font is large enough because line lengths and line breaks happen off the screen now, so y…
These are all cons of zooming not enabling zoom (except for the tap-to-zoom. If the user wants to zoom, they take on those risks.