Yes - he didnt actually say that Britain was in the third world, but you are quite right - anti-zoo sentiment is not particularly strong at the moment and perhaps weaker since Covid. 20 years ago it was MUCH worse and fueled by the BBC on screen and in print.
Is it strong in the 3rd world too? - I dont know.
The (very?) small and often entitled, minority of opposition to most subjects receives proportionally more coverage than the 'silent majority', zoos included. Social media and the internet fuel this, and the lazy media covers negative stories rather than positive ones, because it is easier - so any minority will often appear larger than it actually is, especially to the casual observer.