I never said it was either easy or cheap.
A 10db swing is not an insignificant amount, I think, and particularly when were discussing getting the most out of the sound at the lowest listening levels, every little bit counts, no? I've read a good amount on just this forum regarding folks doing some pretty extreme things to cut down on ambient noise leaking into their listening rooms.
Not trying to pick an argument, as practicality outweighs cost at a certain threshold, but I'd think particularly for those with truly dedicated listening environments, doing what one can to at least get to the lower end of those averages would be worth the time to figure it out.
I'm not sure what Vlad's (the OP's) situation is so no more constructive comment from me there, just making a more general observation.