Of course running is always to put one foot in front of the other. Also writing is to put one letter in fron of another for forming one word, and to put one word in front of another for forming one phrase, and to put one phrase in fronnt of another for forming a talk. Me and you are able to put one foot in front of another, but we are not runners. Me and you are able to write, but not able to write the "Divina Commedia",
The history of methodology shows a lot of different systems, meaning "innovation" during the years.
You can know all the ingredients of a special dish, but using the same ingredients one top chef makes something different than a housewife, cooking every day but not in professional way.
What you say shows a high level of "obscurantism", a total ignorance of physiology and training methodology, the incapacity for analyzing historical changes in the specific contest, and to understand the relation between cause and effect.
Physiology is a science that can only study phenomen when they happen. This means that can study variations in the body only AFTER the training was able to produce them. There si no doubt that training can change physiological parameters and values, the matter is to see HOW and WHEN (not IF).
So, coaches organized the training systems according to the athletic requirements of their era : before 1983 (first edition of WCh) the odd years were practically empty, since the only big Championships were Olympics (every 4 years) and Commonwealth or European CH in the even years in the middle.
For example, Peter Snell improved the WR of 800m, 1000m, Mile in 1962 and 1964, while during 1961 and 1963 he reduced his training, because there were not specific targets.
The same for Herbert Elliot : he destroyed the WR of 1500m and Mile in the year 1958, with a percentage of improvement that, if you use the same approach used with athletes of today, you MUST believe was aided by some doping (from 3'38"1 of Jungwirth to 3'36", the greatest improvement ever, and from 3'57"2 of Ibbotson to 3'54"5). During 1959, without any specific goal, he married his wife, for coming back in 1960, winning Olympics with the new WR of 3'35"6 that was also the "real" last race of his career.
Do you think that the same situation was in the current era some athlete stop running when 22 years old, immediately after a WR, or do you think he can try to run other 10 years, earning not less than 500,000 USD per year ?
In that period, the only real stimulus and motivation for the athletes was "the Glory". No big Championships, no meetings, no official prizes (don't forget athletics was the kingdom of British rich people like Avery Brundage, supporters of a total "amateurism, like also showed by the full meaning of IAAF (International Amateur Athletic Federation).
This was the reason for the long "base period" of Lydiard. If Lydiard had to coach today, absolutely he shouldn't allow the athletes to have very long periods losing the level of intensive ability already built : it was not a smart solution to destroy the level of Aerobic Power that already you reached in the past.
So, a lot of changes in the methodology, also if running is always to put one foot in front of the other...