And also repeatedly outplaying Tretiak in head-to-head tournaments is a nice thing to have. Btw. I believe Czechoslovaks actually allowed less goals than Soviets in the 1971-1978 timeframe, despite Soviets taking most of gold medals.
There is one thing I want to add to the Tretyak vs Holeček head-to-head comparison. I seem to remember someone already mentioned their respective ages during the Europeans project, even though I can't find the post in question right now.
Both goaltenders competed head-to-head from 1971-1978. During that time frame, Tretyak was 18-19 to 25-26 years old and Holeček 26-27 to 33-34 years old.
Head-to-head:
1971: Holeček (26-27) – Best Goaltender and All-star
1972: Holeček (27-28) – All-star
1973: Holeček (28-29) – Best Goaltender and All-star
1974: Tretyak (20-21) – Best Goaltender and All-star
1975: split / Holeček (30-31) – Best Goaltender / Tretyak (21-22) – All-star
1976: Holeček (31-32) – Best Goaltender and All-star
1977: neither
1978: Holeček (33-34) – Best Goaltender and All-star
Tretyak won his first international honour at an age when Holeček didn't even play at the WCH. The Tretyak that Holeček repeatedly outplayed was younger than Holeček was before he won his first international honour.
Holeček overall:
26-27 yo: Best Goaltender and All-star
27-28 yo: All-star
28-29 yo: Best Goaltender and All-star
30-31 yo: Best Goaltender
31-32 yo: Best Goaltender and All-star
33-34 yo: Best Goaltender and All-star
Tretyak overall:
21-22 yo: All-star
26-27 yo: Best Goaltender and All-star
(27-28 yo: Olympics, no individual honours to win)
28-29 yo: Best Goaltender
30-31 yo: Best Goaltender and All-star
(31-32 yo: Olympics, no individual honours to win)
Tretyak retired at the age of 32, when he was still in his prime (he was 2nd in Best Player voting in the USSR that year). It's likely he would have won a few more international honours if he continued to play. That's not taking anything away from what Holeček achieved, but I think it puts their respective achievements a bit into perspective.