His analysis isn’t wrong. China is severely disadvantaged in high end nodes so there’s not gonna be any competition to TSMC from the mainland in high end for a long time if ever. In the low end and midrange China has big advantages in comparison.
The TSMC R&D chief is not wrong. But only among American allies. He assumes there will be no competitor coming out of Japan, SKorea or the West. China will be locked out of those places regardless of how well it does in the high end nodes.
The rest of the world do not demand high end nodes right now with exception of China.
Once upon a time, the rest of the world did not demand solar cells -- with the exception of China. The West, especially the US and Germany, made expensive ones that only the West could afford.
Then China made so many so efficiently that not only was it affordable enough to first satisfy its own market but it made this once expensive item affordable the world over. China had created a market outside West for solar cells. And even though the US had blocked Chinese solar cells for years China came to dominate 90% of the global photovoltaic production line.
You can try to keep your own market expensive like an island to support your companies but eventually the global tide will overwhelm you because you cannot dam the ocean.
China can (or will) gradually make chips first in the legacy nodes and then the high end ones (once the domestic EUV or SSMB arrives) so inexpensive that it can or will create the same global tide in semicons too.
China can (or will) do this in just supporting its own market because that market is so vast that once China steps on any rung of the technology ladder its economy of scale will make anything affordable.
And with semicons, the Chinese domestic market for chips is much, much larger than the domestic market for solar cells when China began its march to dominance in that sector.