dalight gave you a good answer. Were I to summarize it, I’d suggest you need to look to places other than simply physical health in understanding dietary laws.
Condescending much? I just pointed out that that the Dietary Laws are healthy.
As far as looking further, Kosher practice is religious practice. It asks us to do things that if we fail at them have very little real consequence, but as we learn to keep Kosher, we learn to control our appetites and concentrate on each desire that wells up in the context of holiness. Ultimately, the practice teaches us how to rise above being a slave of our cravings and yearnings and become the will that choses what to eat and how to act in accordance with our holy purpose.
Now, if you want deep, we can go as deep as you like.
I misread this, but past the jabs, I did summarize the real purpose of Kosher.
Yes, you (elcid1970) should reach to other sources to understand this. The just because answer works for kids but adults need more. And fortunately, there is so much more. The Reform person who handed you that misstatement probably learned this by half listening to their Rabbi and then repeated this bit as folks are wont to do. This is why some teachings are held back especially among the learned in that they fear a rino will become a unicorn when folks are done misinterpreting them.
Nevertheless, many Reform congregants are very superficially involved in their own faith just as can be said of almost every faith in the US today. It is not a disease of Reform but a nationwide plague of the attempt to Secularize our society which bred the culture wars. Rather than pointing at this sect or that and saying they are "stupid" instead learn what are the teachings and what they are trying to accomplish and then you will have a good basis for understanding. Kosher is a great practice and it gives to those who practice it a myriad of blessings.
If youd like to be on or off, please FR mail me.
Amongst JStreets flaws, this is a silly issue.