Would I be wasting my money to get a turntable?

Couldn't have said it better myself!

Because I have no clue what you're talking about.

This can be fun technics has reasonable turntables at great prices.best buy has some inexpensive you may be able to try it take it back by 15 days.you may have a pre amp with a moving magnet or moving coil stage.then you could go to yard sales ,good will salv army and hunt for vinyl.not the fence type but think of the fun you can have doing this on a budget.then when you think vinyl is art of your streaming,cd system cuz it's fun to change it up.my first turntable was best buy 150 with stylus plug and play now I have 6 all bought used.they hook up to pre amp with phono stage then out of preamp into splitters that take them into class a krell,class a/b michi class h, and multiple class d amps.they all sound great.enjoy the hunt.

“Is there any benefit to me, given my current amplifier with has no analog pass through capability, to adding a turntable to my system?”

Define benefit….

A good vinyl collection would take years to assemble and cost somewhere between $50,000 and $100,000. However, one definition of an audiophile is a person with $50,000 to $100,000 of audio equipment and a dozen LPs which he uses to listen to his equipment (not to the music). That definition comes from a man who owned a store for 40 years serving audiophiles.  He was in the business because he loved, and was very knowledgeable about, music. He had a collection of many thousand LPs. We bonded over our mutual admiration of the transcendent voice of Elly Ameling. A music lover could be transported by her voice with one of her LPs played on a $2,000 system.