Jack’s logic, from my understanding, is along the lines of “Can these changes be considered justifiable and not something that can be nullified through the application of different tactics or putting a more skilled player in the same situation? If not, then there should be no issues with this.”
People place too much weight on the opinions of those on things they themselves have not experienced in the same way as those other people have. Pro tactics are not something that you can simply copypaste and expect success with and this extends to balance discussions. A mixture of personal experiences and critical analyses of both your own gameplay and that of pro players is required and the vast majority of people do not have the self-reflective ability nor desire to achieve this focus and lack of bias. Sure, Jack is sometimes wrong and it can take a while for him to realize it, but once he does he owns up to it.
Unlike some people I could name…
There’s a flaw in your own words there.
That’s the kicker. Regular players input also matters, even if that of pros is taken with less proverbial salt compared to them.
So to say that regular players need to be disregarded in terms of balance discussion is a terrible idea. Even if it’s a balancing act of pros vs casuals at, say, 80/20 split in terms of “importance” or “weight”, by getting rid of the casuals input you ironically end up getting rid of ~80% of all the feedback. That is a massive drop and all good decisions are based on as much information as possible. If 80% of the playerbase want Goblin Sappers nerfed but the 20% that are pros say “no, do this other thing instead”, you’re probably going to see a mixture of the two, combined with any analyses you’ve done of matches alongside this data.