Now take the Madisound kit. It makes my point. The enclosure is still pretty large, and because the speaker has to be sealed to keep it acceptable size, the F3 is only 37 Hz, which can be bested by many speakers using smaller drivers.
OK, but that 37Hz is in an anechoic environment, not a room that may reinforce the lower frequencies via reflections and modes. Smaller drivers may go lower but that's measured at 1M, not across the room and sometimes, smaller speakers don't really have the "authority" in the lower range.
Back in the '70s, most, if not all, speaker companies offered 12" 3-way and sometimes 4-way "designs". Often, these were more "We tried it and they sounded OK" than actual intentional design but they were very common. Also, they often sounded really bad, if they're compared with more recent designs but they were marketed to people who thought that "bigger is better". These were often placed in/near the room corners or against the wall, in order to augment the low end. Other than classical music, true 20Hz-20KHz range wasn't needed and if the speakers only went down to 40Hz, they sounded fine for a lot of the music that was popular- some people bought JBL 4312 monotors because so many recording studios used them and they wanted to have the same speakers, thinking they could "hear the music just like when it was recorded". I never liked them but if the frequency response of the music is limited, they're OK for some things.
The "give them what they want" marketing plan worked until quality became more important than size or quantity and speaker stands that looked like part of the speaker or furniture instead of cinder blocks or milk crates. People who weren't satisfied with commercially speakers experimented and made their own. That is the single biggest reason we have as many decent speakers available now- once the big sellers stopped being the big sellers, the speaker companies found that people wanted better. WAF matters unless the person assembling and using the system is able to have a dedicated space for it.