I don't disagree.
One of the difficulties of the "fundamental" group of any period of time in Christianity is that they are combating a societal sinful practice in the exercise of rebellion, and that combat becomes a point of believers having to decide to separate from the influences of the world rebellion.
A problem in this combat is that the schemes of evil are not stagnate and not uniformed but on the prowl, disguised, and looking for weaknesses to exploit. During the excesses of one generation, certain standards are established by both the ungodly and the believer to both recognize (by the unbeliever) push back (by the believer) at the worldly influences, and more often such push back is carried generationally. My father's wife was a "flapper" but that did not compel me to dance, but to state such was not a part of my relationship with Christ.
That does not mean that the evil one generation combated is not also present in the next, but that the tension of attack has been shifted by the enemy and the church is perpetually slow in detection and response.
There are certain principles that must remain. One is moderation and another temperate. There are others.
For example:
I am a person who does not consume an intoxicant, and even question the effects of the medications that I do take, because I will not allow some medication to influence who I am. Only God has that authority. I teach that the Lord Jesus did not partake of intoxicants because one who is pure cannot allow even the slightest influence. Therefore, intoxicants did not cross his lips.
However, that teaching doesn't mean everyone must toe the line that I hold myself. It is between them and the Holy Spirit, which I make clear. Drink has been used in Christianity without controversy from the beginning, but so has abstinence from intoxicants as demonstrated by Paul's statement to Timothy.
In the roaring 20's drinking was a social aspect propagated by the ungodly rebelliousness, the same as it is today. The difference is found in the area of rebellion and rebelliousness. The element of flaunting rebellion made a difference.
Same with dance.
Same with mixed swimming.
Same with ....
It is where the enemy is focusing his attitude of rebellion.
A principle from Scripture is given by Paul saying in two places in 1 Corinthians:
“Everything is permissible for me,” but not everything is beneficial. “Everything is permissible for me,” but I will not be mastered by anything.
And in another place:
“Everything is permissible,” but not everything is beneficial. “Everything is permissible,” but not everything is edifying.
Ultimately, the believer must stand up against the worldly encroachment. Each must decide for themself at what level they will say, "This far and no more."
For will we not all stand before the Christ and give an accounting?
I would be totally ashamed to be in the arms of one not my wife, partaking of that which is deceitful, and engaged in rebelliousness flaunting my Christian freedom at the expense of a sterling testimony when my Lord decided to end my time here.