Because things like choking someone almost to death, or getting choked are concerning expressions of a damaged psyche. Also unrealistic expectations can cause more frustration on both ends, were people feel unable to meet these expectations and people fail to realize their expectations to be unrealistic.
So in all we could see a development of people having less sex, having less enjoyable sex and using sex to cope with serious mental issues instead of getting help, while society is ignoring problematic soxietal developments by shoving them into sexuality and declaring it as just being liberated kinkyness.
None of these are absolutes and there is many positive changes happening too, but we need to understand sex tastes and sex behaviour to be a reflection of individuals and society, where problems will also show that we need to adress