1Cor 8 has a particular context - idols. The weaker brother is not one who is shackled by a frivolous restriction, not at all.
Paul is saying that idols are nothing, so the meat eaten is simply food. But this is a knowledge of liberty. Now, if a weaker brother sees you eat of this food because you know it's just food, he may be enticed to pay homage to the idol through eating the meat.
It has nothing to do with enticing a teetotaler to have a drink, or enticing an Amish man to use a power saw.
I think modern day equivalents would be:
You get a tribal tattoo because you have the liberty to do so. But a weaker brother might see it and be enticed to get one in honor of a godless religion
Or you might use yoga for physical therapy, and a weaker brother might be enticed to engage in transcendental meditation.
Or you might practice karate for self defense, and a weaker brother might be enticed to engage in Zen Buddhism.
Nothing in 1Cor 8 is not about an activity, but what the activity represents - an idol. If your liberty causes a brother to stumble into the arms of a false god, you should abstain.
If it's just engagement in an activity, like dancing or playing cards, that brother needs to accept that his limitation does not bind you. But even then, your liberty should not be the cause of a weaker brother to stumble into judgmentalism. Paul addressed this issue in Romans 14