It depends entirely where the eigentones are - and in many uk living rooms they are clustered around 40-50hz which can really screw up bass, making it overblown and one note.
Then why does the great majority of audiophiles, people who may spend a great deal of money as well as effort on their systems, not use equalisers, and even regard them as more harmful than useful? 'One-note bass' comes from speaker defect, because it is a resonance of the speakers, not a room. Speakers are nearly always the culprit for boom. Provided speakers are well-designed and manufactured, well selected for their intended purpose, well set up, and well maintained, excessive bass resonance will not be much in evidence, if at all. Perfectionists design rooms specially for hi-fi rather than use equalisers, and even then the benefits are not all that obvious.
One instance of troublesome 'room resonance' was cured simply by switching off the socket ring of the mains, then cleaning the fuse socket and fuse holder pins with Brasso. (And the washing machine was less wobbly on spin, apparently!) Another case was solved by tightening woofer bolts. Tightening up speaker cable connections, even changing/cleaning interconnects, these are normally the ways to clean up bass, though the rest of the range benefits as well. The effects are often cumulative, and a thorough 'clean-up' will often transform a system, producing a sound that one could not buy for any money. The route to hi-fi is only half involved in matters of the wallet.
Anyway, there's a fair difference between 40 Hz and 50 Hz- half an octave! Much music does not get down that low, or not often. And few speakers actually produce much below 50 Hz. Room resonance can actually assist in this part of the spectrum. Most boom is from about 100 Hz up, which is where human hearing begins to get sensitive and boom gets annoying.
Also why assume that the studio engineers got it right?
Because they have equipment and expertise to get it right. The rest of us just need to get the basics of hi-fi sorted. Messing about with 'equalisation' is much more likely to confuse the hi-fi owner than assist him, because it will disguise underlying problems. The first principle of hi-fi is to realise that high fidelity is the mains, modified. Putting that principle into action, getting really tight control of the signal presented to the speaker coils, prevents many problems. When that's done, one can really begin to appreciate the skills of musicians, and composers, too. And indeed the skills and knowledge of engineers and the recording companies who employ them, who know the value of their products.
Certainly if you listen to some music released today ut clearly isn't balanced for playback on a h-fi system as we know it, more likely a car system or earbuds.
Then it shouldn't be played on a hi-fi. Unless through earbuds.
