There is nothing remarkably easy with making a good 7nm chip.
But you know what is remarkably easy by comparison?
That’s sending a man to the moon. The process of making modern chips are way harder to develop, than the technology for a manned mission to the moon.
What makes you think China won’t beat TSMC? When TSMC once was a newcomer too, that nobody thought would ever beat IBM, DEC, Sun, AMD and definitely not Intel.
What’s the difference between TSMC beating everybody else, and China with about 60 times the ressources doing the same to TSMC? I know TSMC had help early on, but China has long since surpassed those initial stages.
This attitude that China can never beat the west is naive, and it’s potentially destructive, as it grossly underestimates a rising economy, with a population more than 4 times bigger than their main rival.