Main points raised there:
1) This story is about four employees, who were not closely familiar to the core technology of ASML.
2) Looking at the circumstances, it seems far more likely that this was an action by ex-exployees with commercial motives, rather than government-sponsored spying.
3) ASMLs core technology simply remains in The Netherlands. An anecdote: 15 years ago ASML came with the most advanced lithography scanner of that time. It was copied in China to the last screw, but the device simply didn't work, because they lacked intricate knowledge on its actual operation.
[1] https://www.npostart.nl/nieuwsuur/16-04-2019/VPWON_1297076