When two clauses are joined by though the second clause must counter the idea expressed in the first clause with a predicate that would not normally flow from that of the first clause.
The place has nothing but rain in the summer and the streets are
dangerous at night though tourists flock there for some reason. good
The Z-Class LuxusMobile is a very expensive car though few can afford it. tautological (no contrast)
The Z-Class LuxusMobile is a prestige vehicle though few can afford it. tautological (no contrast)
The Z-Class LuxusMobile is very reliable because it uses only the finest parts and components available which are rarely, if ever, used in average cars, though few can afford it. perfectly grammatical but semantically marginal because the simple contrast of "reliability" and "affordability" is muddied by the other statements about high cost
We cannot fix the LuxusMobile example by saying because instead of though.
The Z-Class LuxusMobile is a very expensive car because few can afford it.
There, cause and effect are backwards.
The Z-Class LuxusMobile is a luxury car that many desire but few can afford.
The Z-Class LuxusMobile is a luxury car that many desire though few can afford.
P.S. OP has submitted another sentence in the comments below, which I include here:
"It is regarded as a great honor and a sign of respect to have a
handcrafted coffin in this country though only the heads of households
who have achieved some level of success may be buried in one."
and has clarified that "having" a coffin is the same as owning one and being buried in it; and "may" means "are permitted".
The sentence then has this basic structure:
"Fancy coffins are considered an honor though the honor is one few people are permitted to receive".
The second clause introduced by though is thus a kind of qualification.
People consider the fancy coffin an honor for the deceased and a sign of (their?) respect (for the deceased) but they are not permitted to bestow that honor on and show that respect to just anyone.
That qualification has nothing to do with the general opinion of the fancy coffin and its symbolism per se. Rather, it is a restriction placed on those who wish to use the symbol. The clause introduced by though is thus more a supplement or an adjunct than it is integral.
People regard a handcrafted coffin as a way to honor and show respect
to the dead—though only a head of household who had reached a
certain level of success is permitted to be buried in such a coffin.