Different subwoofer settings for different albums?


So a dealer I know told me that he doesn’t use subwoofers and doesn’t know anyone who does (!) because he finds that every record has different levels of bass and would require a new subwoofer crossover point to properly blend with the main speakers.  Anyone else have this experience?
redwoodaudio
You can inform your dealer in 2003 a Digital Drive servo subwoofer was introduced which allowed detailed automatic and manual frequency interaction with a main speaker system. The accompanying six customizable frequency presets may have satisfied his concerns.
By 2011 the software was expanded to a Plus version.

The main speakers are responsible for analog playback to the point where their design begins its low frequency roll off.
At the beginning of the speakers roll off the digital software used by these subwoofers allows the user to begin designing an optimized crossover region using a Frequency Response and Parameters tool that makes multiple adjustments of Individual Parametric Filter EQ, Parametric Filter Frequency and level, Q (Bandwidth) Parametric filter, and gain all by using a simple visual drag and drop while listening. 
The result is, for the most part, an unnoticeable crossover and a sub frequency presentation that more closely matches the main speakers low frequency presentation. 

Since these initial equalization settings are subtly blending with the main speakers its suggested they be used on all six presets down to the frequency the user would like to increase, flatten, or decrease bass gain to accommodate the rooms demands and/or the music to the users personal taste.  

These software adjustments allow a blending in of multiple crossover parameters rather than a typical subwoofers hard crossover setting at which point the basic sub simply turns on at its full predetermined gain which may or may not match the media being played. Possibly leading your dealers complaint regarding subwoofers.
I don't have a problem with applying EQ. 

Using the subwoofer's level adjustment or anything else though.... Ugh.
@mijostyn - for now, not doing the DIY thing, but I am curious… maybe someday

@m-db - what is this software you describe?
I have had excellent results with setting up my new pair of REL carbon subs using Anthem STR integrated with ARC room correction. I tried the High level connection but I am much more please using the bass management in my integrated amp. It is not only about the crossover of the subs but also how it aligns with the roll off of your main speakers. My Focal Sopra 3s go down to 30Hz which is also where the subs start to fade but the bass is much better overall by setting my speakers to crossover to the subs below 75hz. I believe a Bass Management/DSP system is very helpful in getting the sub integration right.