I guess the poster may have meant that concentration is a skill you develop - an internal quality - and any seeker should keep in mind that there are no excuses: you have to "actually do it", not e.g. attempt getting it from the outside while internally remaining alien.

When you learn acrobatics, you may research about the shoes and haircut etc. that hinder the least and facilitate the most, but it will remain an ability, a skill, not a prosthesis, not an externally enabled state.

Moreover, it may have meant that since concentration is also a negative state (to gain concentration avoid its disturbances), you have to declutter, not to add further - to remove elements, not to pose them.

Moreover, it may have meant that to learn riding a bicycle, you "do it" (you climb the bike and attempt action), you do not «rely[] on science». The "science" is inside (natural cybernetics, feedback based skill building), not explicit outside.