yeah dude vegans make up a pretty small portion of the population, so of course the meat industry hasn’t been just erased like magic. societal changes like this happen at a glacial pace and the idea is that more people become vegan over time and thus demand for those products gradually falls. even if 10% of the population went vegan, demand for those products would fall by 10% and there would be that many less animals killed for it because it would not be profitable.
to claim that it is ineffective is like claiming that eating healthy makes no difference from eating like shit after doing it for a single day and not seeing amazing results.