i would partially agree with this because I feel there's a lot of nuance to job hunting.
on one side i was able to move from india-germany with only 2 years of experience as a developer and ~30 job applications. But, that's because Germany has/had a massive demand and the competition for international talent compared to a place Silicon Valley for example is a lot less competitive (at that point anyways).
once i got laid of in germany, i had sent 100s of applications but due to the market and inflation, my interview rate for every 100 applications was only 5-10% in germany vs. 50% for my previous applications.
so, i think there's a nuance to what the 'hear-back' rate from companies would be like based on what the market is like, the country, one's own skills, resume, etc.
would ofc agree moving across widely different tech-stacks would lower the chances of getting a reply.