An anecdotal "a lot of" is not an authoritative source. >99% of browsers in active use support JS (https://gs.statcounter.com/browser-market-share) and <1% of people have JS disabled (https://deliberatedigital.com/blockmetry/javascript-disabled).

You say "a lot of", but the statistics say "a statistically insignificant percentage". I'm all for designing your static webpages with no need for JS, but the claim that a lot of people have it turned off is demonstrably false.

Anyway, hovering on an image to get a description shouldn't need javascript, that's an alt tag that is definitely supported by anything but hobby project browsers.