On Android the browser renders the page at full width, making the icon and text unreadablely small. You can zoom in, but that shouldn't be necessary in the first place if the site was responsive.
Bootstrap's screens reader only classes are somewhat of a hack, and does the opposite of what you're suggesting anyway (aria-hidden is the proper way to go, but as you said that will mean adding a ridiculous amount of markup to the page), while images support screen readers natively via the alt attribute - no messy markup needed.
Bootstrap's screens reader only classes are somewhat of a hack, and does the opposite of what you're suggesting anyway (aria-hidden is the proper way to go, but as you said that will mean adding a ridiculous amount of markup to the page), while images support screen readers natively via the alt attribute - no messy markup needed.