They look like that -- because that's
exactly what they were... but the fleapower guys discovered that they
get the midrange right in a way that's pretty rare in any driver -- much less a cheap-jack one from Radio Shack.
There have been occasional car audio drivers that 'crossed over' into hifi, yes -- they're few and far between,
and even the ones that developed something of a following were, shall we say,
acquired tastes.

One that pops into mind was a Radio Shack 4 x 10 inch

twincone; catalog number 40-1297.
View attachment 1317553
source:
www.radioshackcatalogs.com (1988)
As an aside, I once had a Chevy Cavalier that used the 4 x 10" speakers - GM foisted these things on America for a few years in the 1980s in several, perhaps many, models
The other "popular" (in certain circles) R/S "fullrange" driver of that era was the 4" 40-1197, which was an OEM version of Fostex's FE-103. This one
wasn't aimed at car audio
per se, but they did develop a reputation. R/S sold them for many, many ears (ca. 2 decades), and Fostex still has a couple of FE-103 models in production. Personally, I preferred - and still prefer - the 40-1354. I've always found the 40-1197 to be a bit
tizzy-sounding. Folks had all kinds of tricks and tweaks to tame these drivers -- Dammar varnish treatment of the cone being one of them.
View attachment 1317554
source:
www.radioshackcatalogs.com (1968)
View attachment 1317558
source:
www.radioshackcatalogs.com (2000)
... that's thirty-two years in their catalogs
James (Jamie) Melhuish's Full Range Driver site & forum was/were Mecca for the fullrangers
back in the day. There used to be an archive of the forum on a chipamp site -- I have no idea if it is still extant or not.